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Dr. John Sweetenham and Dr. Erika Hamilton discuss top abstracts that will be presented at the 2025 ASCO Annual Meeting, including research on tech innovations that could shape the future of oncology. Transcript Dr. John Sweetenham: Hello, and welcome to the ASCO Daily News Podcast. I'm your host, Dr. John Sweetenham, and I'm delighted to be joined today by Dr. Erika Hamilton, a medical oncologist and director of breast cancer and gynecologic cancer research at the Sarah Cannon Research Institute in Nashville, Tennessee. Dr. Hamilton is also the chair of the 2025 ASCO Annual Meeting Scientific Program, and she's here to tell us about some of the key abstracts, hot topics, and novel approaches in cancer care that will be featured at this year's Annual Meeting. Our full disclosures are available in the transcript of this episode. Dr. Hamilton, it's great to have you on the podcast today, and thanks so much for being here. Dr. Erika Hamilton: Thanks, Dr. Sweetenham. I'm glad to be here. Dr. John Sweetenham: Dr. Hamilton, the Presidential Theme of the Annual Meeting this year is ‘Driving Knowledge to Action: Building a Better Future,' and that's reflected in many of the sessions that will focus on action-oriented guidance to improve care for our patients. And as always, there'll be great presentations on practice-changing abstracts that will change treatment paradigms and transform care. Can you tell us about some of the hot topics this year and what you're particularly excited about? Dr. Erika Hamilton: You're right. Dr. Robin Zon's theme is ‘Driving Knowledge to Action: Building a Better Future,' and you're going to see that theme really interlaced throughout the ASCO program this year. We had a record number of submissions. Over 5,000 abstracts will be published, and there'll be about 3,000 presentations, either in oral format or poster presentations. We have 200 dynamic sessions. Many of the discussants will be highlighting key takeaways and how we can translate action-oriented guidance to better treat our patients to build a better future. Our state-of-the-art science will include a Plenary Session. This will feature presentations as well as discussion of each of the presentations for clinical late-breaking abstracts. We have Clinical Science Symposia that I'm particularly excited about this year. These will feature key abstracts as well as discussions and a foundational talk around the subject. We're covering novel antibody-drug conjugate targets, turning “cold” tumors “hot” to include CAR T, as well as the future of cancer detection. There'll be rapid oral abstracts, case-based panels, and this will also feature interactive audience polling and case discussions. I also want to highlight the community connection opportunities. There will be 13 Communities of Practice that will be meeting on-site during ASCO, and there's also really a plethora of networking opportunities for trainees and early-career professionals, a Women's Networking Center, a patient advocate space, and I'm happy to report there will also be live music out on the terrace this year at ASCO. Dr. John Sweetenham: Well, that's going to be a really great addition. I have to say, I think this is always a special time of year because excitement starts to mount as the meeting gets closer and closer. And once the abstracts are out there, I certainly personally feel that the excitement builds. Talking of abstracts, let's dive into some of the key abstracts for this year's meeting. I'd like to start out by asking you about Abstract 505. This reports on 15-year outcomes for women with premenopausal hormone receptor-positive early breast cancer in the SOFT and TEXT trials. It assesses the benefits of adjuvant exemestane and ovarian function suppression or tamoxifen and ovarian function suppression. So, could you talk us through this and tell us what you think the key takeaways from this abstract are? Dr. Erika Hamilton: Absolutely. This is essentially the SOFT and TEXT trials. They are trials that we've been following for quite some time, evidenced by the 15-year outcome. And I think it really answers two very important questions for us regarding adjuvant endocrine therapy for patients that are facing hormone receptor-positive disease. The benefit of ovarian function suppression for one, and then second, the benefit of exemestane over tamoxifen, which is our SERM [selective estrogen receptor modulator]. So, in terms of the SOFT trial, when we talk about distance recurrence-free interval, which I really think is probably the most meaningful because secondary cancers, et cetera, are not really what we're getting at here. But in terms of distant recurrence-free interval, certainly with tamoxifen, using tamoxifen plus ovarian function suppression adds a little bit. But where we really get additional benefits are by moving to exemestane, an aromatase inhibitor with the ovarian function suppression. So, for example, in SOFT, for distant recurrence-free interval for patients that have received prior chemotherapy, the distance recurrence-free interval was 73.5% with tamoxifen, bumped up just a tiny bit to 73.8% with ovarian function suppression. But when we used both ovarian function suppression and switched to that aromatase inhibitor, we're now talking about 77.6%. It may seem like these are small numbers, but when we talk about an absolute benefit of 4%, these are the type of decisions that we decide whether to offer chemotherapy based on. So, really just optimizing endocrine therapy really can provide additional benefits for these patients. Just briefly, when we turn to TEXT, similarly, when we look at distance recurrence-free interval for our patients that are at highest risk and receive chemotherapy, tamoxifen and ovarian function suppression, 79%; 81% with exemestane and ovarian function suppression. And when we talk about our patients that did not receive chemotherapy, it increased from 91.6% up to 94.6%—very similar that 3% to 4% number. So, I think that this is just very important information when counseling our patients about the decisions that they're going to make for themselves in the adjuvant setting and how much we want to optimize endocrine therapy. Dr. John Sweetenham: Thanks so much for your insight into that. Dr. Erika Hamilton: Yeah, absolutely. So, let's turn to hematologic malignancies. Abstract 6506 reports exciting results on the new agent ziftomenib in relapsed/refractory NPM1-mutant acute myeloid leukemia. This is a phase 1b clinical activity study and safety results. This was the pivotal KOMET-001 study. And my question is, will this new agent fulfill an unmet need in this NPM1 space? Dr. John Sweetenham: Yeah, great question. And I think the answer is almost certainly ‘yes'. So, just as some brief background, NPM1 mutation is known to be a driver of leukemogenesis in around 30% of patients with AML, and it's a poor prognostic factor. And typically, about 50% of these patients will relapse within a year of their first-line therapy, and only around 10% of them will get a subsequent complete remission with salvage therapy. Menin inhibitors, which disrupt the interaction between menin and KMT2A, are known to be active in NPM1-mutated as well as in KMT2A-rearranged AML. And ziftomenib is a selective oral menin inhibitor, which in this study was evaluated at a dose of 600 mg once a day, as you mentioned, a phase 1b/2 study, which is multicenter and presented by Dr. Eunice Wang from Roswell Park. It's a relatively large study of 112 patients who were treated with this standard dose with relatively short median follow-up at this time. The median age was 69 years, and median prior therapies were two, but with a range of one to seven. And I think very importantly, 60% of these patients had previously been treated with venetoclax, and 23% of them had had a prior transplant. Looking at the results overall for this study, the overall response rate was 35%, which is actually quite impressive. Specifically for those patients in the phase 2 part of the study, around 23% achieved a CR [complete remission] or CRh [complete remission with partial hematologic recovery]. What's very interesting in my mind is that the response rates were comparable in venetoclax-naive and venetoclax-exposed patients. And the drug was very well tolerated, with only 3% of patients having to discontinue because of treatment-related adverse events. And I think the authors appropriately conclude that, first of all, the phase 2 primary endpoint in the study was met, and that ziftomenib achieved deep and durable responses in relapsed and refractory NPM1-mutated AML, regardless of prior venetoclax, with good tolerance of the drug. And so, I think putting all of this together, undoubtedly, these data do support the potential use of this agent as monotherapy and as a new option for those patients who have relapsed or refractory NPM1-mutated acute myeloid leukemia. So, let's move on a little bit more now and change the subject and change gears completely and talk about circulating tumor DNA [ctDNA]. This has been a hot topic over a number of years now, and at this year's meeting, there are quite a few impactful studies on the use of ctDNA. We have time to focus on just one of these, and I wanted to get your thoughts on Abstract 4503. This is from the NIAGARA trial, which looks at ctDNA in patients with muscle-invasive bladder cancer who receive perioperative durvalumab. Could you tell us a little bit about this study? Dr. Erika Hamilton: So, this was the phase 3 NIAGARA trial, and this is literally looking for patients with muscle-invasive bladder cancer that are cisplatin-eligible, and the addition of durvalumab to neoadjuvant chemotherapy. So here, this is a planned exploratory analysis of ctDNA and the association with clinical outcomes from NIAGARA. So, this is really the type of study that helps us determine which of our patients are more likely to have a good outcome and which of our patients are more likely not to. There were 1,000 randomized patients in this study, and 462 comprised the biomarker-evaluable population. There were about half in the control arm and half in the durvalumab arm. And overall, the ctDNA-positive rate at baseline was about 57%, or a little over half, and that had decreased to about 22% after neoadjuvant treatment. ctDNA clearance rates from baseline to pre-radical cystectomy was about 41% among those with durvalumab and 31% among those in control. And the non-pCR rate was 97% among patients with pre-cystectomy ctDNA-positive status. So, this really gives us some information about predicting who is going to have better outcomes here. We did see a disease-free survival benefit with perioperative durvalumab, and this was observed in post-cystectomy ctDNA-positive as well as the ctDNA-negative groups. Shifting gears now to GI cancer, Abstract 3506 is a long-term safety and efficacy study of sotorasib plus panitumumab and FOLFIRI for previously treated KRAS G12C-mutated metastatic colorectal cancer. And this is the CodeBreaK-101 study. What are your thoughts on this study? Dr. John Sweetenham: Yeah, thanks. A very interesting study, and this abstract builds upon the phase 3 CodeBreaK-300 trial, which I think has just been published in the Journal of Clinical Oncology. This showed that the combination of sotorasib and panitumumab improved clinical outcomes in patients with chemorefractory KRAS G12C-mutated metastatic colorectal cancer. The current abstract, as you mentioned, reports the CodeBreaK-101 trial. And this was a phase 1b trial where FOLFIRI therapy was added to sotorasib and panitumumab in previously treated patients with KRAS G12C-mutated metastatic colorectal cancer. The abstract reports the overall and progression-free survival results, as well as some updated safety and response data. So, in this study, patients with this particular mutation who had received at least one prior systemic treatment but were KRAS G12C inhibitor-naive were enrolled into an expansion cohort of the CodeBreaK-101 protocol. And these patients received what apparently now recommended as the standard phase 2 dose of sotorasib of 960 mg daily, plus panitumumab and a standard dose of FOLFIRI. And the primary endpoint of the study was safety, and secondary endpoints included confirmed response, overall response, and progression-free survival, as assessed by the investigator. And by November of last year, 40 patients had been enrolled into this study. Common treatment-related adverse events were cutaneous; some patients developed neutropenia, and stomatitis was fairly widespread. Discontinuation of sotorasib because of adverse events was only seen in 1% of patients, although patients did have to discontinue because of toxicity from some of the other agents in the combination. Looking at the results of this study, the updated objective response rate was 57.5%, and the disease control rate was estimated at 92%, going on 93%, with a median time to response of 1.6 months and a median response duration of 6 months. After a median follow-up of 29.2 months, the median progression-free survival was 8.2 months, and the overall survival 17.9 months. So, the authors have concluded that this combination, including sotorasib, panitumumab, and FOLFIRI, does appear to show quite promising long-term efficacy in pretreated patients with this specific mutation. The ongoing phase 3 study they mentioned, CodeBreaK-301, is aiming to evaluate this combination against the standard of care in the first-line setting for patients with KRAS G12C-mutated colorectal cancer. So, promising results, and we'd be very interested to see how this particular combination performs in the frontline. Dr. Erika Hamilton: Fantastic. Thanks so much for sharing that. Let's shift gears again and really talk about digital technology. I feel that we're all going to have to get much better with this, and really, there are a lot of promises for our patients coming here. There are a lot of abstracts at ASCO that are focusing on innovations in digital technology, including a really interesting psychosocial digital application for caregivers of patients that are undergoing hematopoietic stem cell transplantation. Can you tell us a little bit about this? It's Abstract 11000. Dr. John Sweetenham: Yeah, absolutely. This abstract certainly caught my eye, and I think it's intriguing for a number of reasons, partly because it's app-based, and partly also because it specifically addresses caregiver burden and caregiver needs in the oncology setting, which I think is especially important. And although the context, the clinical context of this study, is hematopoietic stem cell transplantation, I think it has potential applications way beyond that. We all know that caregivers of patients undergoing stem cell transplantation have significant quality-of-life struggles. They are well-documented to have significant psychological and emotional strain before, during, and after stem cell transplantation. And this abstract describes an application called BMT-CARE, which is aimed at improving caregivers' quality of life, caregiver burden, mood symptoms, and coping skills, and so on. So, this was a single-center, randomized trial from MGH [Massachusetts General Hospital] of this app for stem cell transplant caregivers, compared with usual care in those individuals. And the eligible patients, or eligible individuals, were adults caring for patients with heme malignancy undergoing either an autologous or an allogeneic stem cell transplant. Patients were randomly assigned either to use the app or for usual care. And the app itself—and I think it'll be interesting to actually see this at the meeting and visualize it and see how user-friendly and so on it is—but it comprises five modules, which integrate psychoeducation, behavior change, stress management, and they're delivered through a kind of interactive platform of educational games and videos. And then participants were self-reporting at baseline and then 60 days after transplant. So, around 125 patients were enrolled in this study, of around 174 who were initially approached. So, just over 70% uptake from caregivers, which is, I think, relatively high, and evenly distributed between the two randomized arms. And the majority of the participants were spouses. And at 60 days post-stem cell transplant, the intervention participants reported a better quality of life compared with those who received usual care. If you break this down a little bit more, these participants reported lower caregiving burden, lower incidence of depression, fewer PTSD symptoms, and overall better coping skills. So, the authors conclude that this particular app, a digital health intervention, led to pretty substantial improvements in quality of life for these caregivers. So, intriguing. As I said, it'll be particularly interesting to see how this thing looks during the meeting. But if these kind of results can be reproduced, I think this sort of application has potential uses way beyond the stem cell transplant setting. Dr. Erika Hamilton: Yeah, I find that just so fascinating and very needed. I think that the caregiving role is often underestimated in how important that is for the patient and the whole family, and really giving our caregivers more tools in their toolbox certainly is quite helpful. Dr. John Sweetenham: Absolutely. Well, the meeting is getting closer, and as I mentioned earlier, I think anticipation is mounting. And I wanted to say thanks so much to you for chatting with me today about some of the interesting advances in oncology that we're going to see at this year's meeting. There is a great deal more to come. Our listeners can access links to the studies we've discussed today in the transcript of this episode. I'm also looking forward, Dr. Hamilton, to having you back on the podcast after the Annual Meeting to dive into some of the late-breaking abstracts and some of the other key science that's captured the headlines this year. So, thanks once again for joining me today. Dr. Erika Hamilton: Thanks so much for having me. Pleasure. Dr. John Sweetenham: And thank you to our listeners for joining us today. Be sure to catch my “Top Takeaways from ASCO25.” These are short episodes that will drop each day of the meeting at 5:30 p.m. Eastern Time. So, subscribe to the ASCO Daily News Podcast wherever you prefer to listen, and join me for concise analyses of the meeting's key abstracts.   Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.   More on today's speakers: Dr. John Sweetenham   Dr. Erika Hamilton @erikahamilton9   Follow ASCO on social media:  @ASCO on Twitter  ASCO on Bluesky  ASCO on Facebook   ASCO on LinkedIn     Disclosures:     Dr. John Sweetenham:     No relationships to disclose  Dr. Erika Hamilton: Consulting or Advisory Role (Inst): Pfizer, Genentech/Roche, Lilly, Daiichi Sankyo, Mersana, AstraZeneca, Novartis, Ellipses Pharma, Olema Pharmaceuticals, Stemline Therapeutics, Tubulis, Verascity Science, Theratechnologies, Accutar Biotechnology, Entos, Fosun Pharma, Gilead Sciences, Jazz Pharmaceuticals, Medical Pharma Services, Hosun Pharma, Zentalis Pharmaceuticals, Jefferies, Tempus Labs, Arvinas, Circle Pharma, Janssen, Johnson and Johnson   Research Funding (Inst): AstraZeneca, Hutchison MediPharma, OncoMed, MedImmune, Stem CentRx, Genentech/Roche, Curis, Verastem, Zymeworks, Syndax, Lycera, Rgenix, Novartis, Millenium, TapImmune, Inc., Lilly, Pfizer, Lilly, Pfizer, Tesaro, Boehringer Ingelheim, H3 Biomedicine, Radius Health, Acerta Pharma, Macrogenics, Abbvie, Immunomedics, Fujifilm, eFFECTOR Therapeutics, Merus, Nucana, Regeneron, Leap Therapeutics, Taiho Pharmaceuticals, EMD Serono, Daiichi Sankyo, ArQule, Syros Pharmaceuticals, Clovis Oncology, CytomX Therapeutics, InventisBio, Deciphera, Sermonix Pharmaceuticals, Zenith Epigentics, Arvinas, Harpoon, Black Diamond, Orinove, Molecular Templates, Seattle Genetics, Compugen, GI Therapeutics, Karyopharm Therapeutics, Dana-Farber Cancer Hospital, Shattuck Labs, PharmaMar, Olema Pharmaceuticals, Immunogen, Plexxikon, Amgen, Akesobio Australia, ADC Therapeutics, AtlasMedx, Aravive, Ellipses Pharma, Incyte, MabSpace Biosciences, ORIC Pharmaceuticals, Pieris Pharmaceuticals, Pieris Pharmaceuticals, Pionyr, Repetoire Immune Medicines, Treadwell Therapeutics, Accutar Biotech, Artios, Bliss Biopharmaceutical, Cascadian Therapeutics, Dantari, Duality Biologics, Elucida Oncology, Infinity Pharmaceuticals, Relay Therapeutics, Tolmar, Torque, BeiGene, Context Therapeutics, K-Group Beta, Kind Pharmaceuticals, Loxo Oncology, Oncothyreon, Orum Therapeutics, Prelude Therapeutics, Profound Bio, Cullinan Oncology, Bristol-Myers Squib, Eisai, Fochon Pharmaceuticals, Gilead Sciences, Inspirna, Myriad Genetics, Silverback Therapeutics, Stemline Therapeutics

Dr. Allison Zibelli and Dr. Erika Hamilton discuss the results of the DESTINY-Breast06 trial in HR+, HER2-low and HER2-ultralow metastatic breast cancer and the A-BRAVE trial in early triple-negative breast cancer, the results of which were both presented at the 2024 ASCO Annual Meeting. TRANSCRIPT Dr. Allison Zibelli: Hello, I'm Dr. Allison Zibelli, your guest host of the ASCO Daily News Podcast. I'm an associate professor of medicine and breast medical oncologist at the Sidney Kimmel Cancer Center of Jefferson Health in Philadelphia. My guest today is Dr. Erika Hamilton, a medical oncologist and director of breast cancer research at the Sarah Cannon Research Institute. We'll be discussing the DESTINY-Breast06 trial, which showed a progression-free advantage with the antibody-drug conjugate trastuzumab deruxtecan (T-DXd) compared to chemotherapy in hormone receptor-positive HER2-low or HER2-ultralow metastatic breast cancer. We'll address the implications of this study for the community, including the importance of expanding pathology assessments to include all established subgroups with HER2 expression, and the promise of expanding eligibility for antibody-drug conjugates. We'll also highlight advances in triple-negative breast cancer, focusing on the A-BRAVE trial, the first study reporting data on an immune checkpoint inhibitor avelumab in patients with triple-negative breast cancer with invasive residual disease after neoadjuvant chemotherapy.  Our full disclosures are available in the transcript of this episode.  Erika, it's great to have you on the podcast today. Dr. Erika Hamilton: Thanks so much, Allison. Happy to join. Dr. Allison Zibelli: Antibody-drug conjugates are rapidly changing the treatment landscape in breast cancer. The data from the DESTINY-Breast06 trial suggests that trastuzumab deruxtecan may become a preferred first-line treatment option for most patients with HER2-low or HER2-ultralow metastatic breast cancer after progression on endocrine therapy. First, could you remind our listeners, what's the definition of HER2-ultralow and what were the findings of this trial? Dr. Erika Hamilton: Yeah, those are fantastic questions. Ultralow really has never been talked about before. Ultralow is part of a subset of the IHC zeros. So it's those patients that have HER2-tumor staining that's less than 10% and incomplete but isn't absolutely zero. It's even below that +1 or +2 IHC that we have classified as HER2-low. Now, I think what's important to remember about D-B06, if you recall, D-B04 (DESTINY-Breast04) was our trial looking at HER2-low, is that D-B06 now included HER2-low as well as this HER2-ultralow category that you asked about. And it also moved trastuzumab deruxtecan up into the frontline. If you recall, D-B04 was after 1 line of cytotoxic therapy. So now this is really after exhausting endocrine therapy before patients have received other chemotherapy. And what we saw was an improvement in progression-free survival that was pretty significant: 13.2 months versus 8.1 months, it was a hazard ratio of 0.62. And you can ask yourself, “well, was it mainly those HER2-low patients that kind of drove that benefit? What about the ultralow category?” And when we look at ultralow, it was no different: 13.2 months versus 8.3 months, hazard ratio, again, highly significant. So I think it's really encouraging data and gives us some information about using this drug earlier for our patients with hormone receptor-positive but HER2-negative disease.  Dr. Allison Zibelli: I thought this study was really interesting because it's a patient population that I find very difficult to treat, the hormone receptor-positive metastatic patient that's not responding to endocrine therapy anymore. But it's important to mention that T-DXd resulted in more serious toxicities compared to traditional chemotherapy in this study. So how do you choose which patients to offer this to? Dr. Erika Hamilton: Yeah, those are both great points. So you're right, this is after endocrine therapy. And in fact, about 85% of these patients had received at least 2 prior lines of endocrine therapy. So I have some people kind of asking, “Well, if endocrine therapy really isn't benefiting everyone in the second-line setting post-CDK, should we just move to the ADCs?” And, no, probably we should really make sure that we're exhausting endocrine therapies for those patients that are going to benefit. And once we determine somebody has endocrine-resistant disease, that's when we would think about switching. In terms of the side effects, I think you're right. It's mainly ILD that's probably the more serious side effect that we worry about a little bit with trastuzumab deruxtecan. The good news is, through multiple trials, we've gotten a little bit better at managing this. We've pretty much all but eliminated any fatal cases of ILD, definitely less than 1% now. ILD rates, depending on what study you look for, kind of ranges in that 10% to 15% range. Any grade ILD on D-B06 was 11.3%. So really kind of making sure that we look for ILD at scans, making sure that patients are educated to tell us about any new pulmonary symptoms: cough, exertional dyspnea, shortness of breath at rest, etc. But I think the most common side effects that we really deal with on a daily basis with trastuzumab deruxtecan, luckily, is nausea, which we've gotten better at managing with the 2- or 3-drug antiemetic regimen, and probably a little bit of fatigue as well. Dr. Allison Zibelli: Thank you. So, I think for most people in the community, the sticking point here will be expanding pathology assessments to include all of the subgroups, including the ultralow. Most patients in the community are not testing for HER2-low and HER2-ultralow now. Dr. Erika Hamilton: Historically, we kind of all did HER2 IHC, right? And then as FISH became available, there were a lot of institutions that moved to FISH and maybe didn't have IHC anymore. And now, at least in my institution, we do both. But I think it's a very important point that you made that IHC was really designed to pick out those patients that have HER2-high, the 3 pluses or the FISH amplified cases. It was not to tell the difference between a 1+ or a 2+ or a 0 that's not quite a 0 and a 1+. So I think you're right. I think this is tough. I probably have a little bit more of an interesting take on this than some people will. But data from ASCO, not this year but in 2023, there was actually a pretty eloquent study presented where they looked at serial biopsies in patients, and essentially, if you got up to 4 or 5 biopsies, you were guaranteed to have a HER2-low result. Now, this didn't even include ultralow, which is even easier. If we know we include ultralow, we're really talking about probably 85% to 90% of our patients now that have some HER2 expression. But if we biopsy enough, we're guaranteed to get a HER2 low.  And so I think the question really is, if we know IHC wasn't really designed to pick out these ultralows, and we know kind of greater than 90% of patients are going to have some expression, did we kind of develop this drug a little bit backwards? Because we thought we understood HER2, and the reality is this drug is a little bit more like a sacituzumab govitecan, where we don't test for the TROP2. Should we really be kind of serial biopsying these patients or should maybe most patients have access to at least trying this drug?  Dr. Allison Zibelli: So I don't think that most of my patients will really be happy to sign up for serial biopsies. Dr. Erika Hamilton: Agreed. Dr. Allison Zibelli: Do we have any emerging technologies for detecting low levels of HER2? You talked about how the IHC test isn't really designed to detect low levels of HER2. Do you think newer detection techniques such as immunofluorescence will make a difference, or will we have liquid biopsy testing for this? Dr. Erika Hamilton: Yeah, I think liquid biopsy may be a little bit hard, just because some of those circulating tumor cells are more of a mesenchymal-type phenotype and don't necessarily express all of the same receptors. Normally, if they're cytokeratin-positive, they do, but certainly there is a lot out there looking at more sensitive measures. You mentioned immunofluorescence, there are some even more quantitative measures looking at lower levels of HER2. I definitely think there will be. I guess, ultimately, with even the IHC zeros that are the less than 10% incomplete staining, having a PFS that was absolutely no different than the HER2 low, I guess the question is, how low can we really go? We know that even the IHC zeros doesn't mean that there's no HER2 expression on the cell surface. It just means that maybe there's a couple of thousand as opposed to 10,000 or 100,000 copies of HER2. And so it really appears that perhaps this drug really is wedded to having a lot of HER2 expression. So ultimately, I wonder how much we're going to have to use those tests, especially with what we know about tumor heterogeneity. We know that if we biopsy 1 lesion in the liver, biopsy a lymph node, or even another lesion in the liver, that the HER2 results can have some heterogeneity. And so ultimately, my guess is that most people have some HER2 expression on their breast cancer cells. Dr. Allison Zibelli: So maybe we're going to be using this for everybody in the future. Dr. Erika Hamilton: It certainly seems like we keep peeling back the onion and including more and more patients into the category that are eligible to receive this. I agree. Dr. Allison Zibelli: Let's move on to triple-negative breast cancer, namely the A-BRAVE trial. This was an interesting trial for patients that did not get neoadjuvant immunotherapy and testing 2 groups. The first group was those with residual disease after neoadjuvant conventional chemotherapy. The second group was people with high-risk disease identified upfront that had upfront surgery. The study found that adjuvant avelumab did not improve disease-free survival versus observation, which was the study's primary endpoint. But interestingly, there was a significant improvement in 3-year overall survival and distant disease-free survival. Can you give us your thoughts on that? Dr. Erika Hamilton: Yeah, I think this study was really interesting. Right now, the standard for our patients with larger or node-positive triple-negative cancers is KEYNOTE-522. It's a pretty tough regimen. It's kind of 2 sequential uses of 2 chemotherapies, so 4 chemotherapy agents total with pembrolizumab. But you're right, this study looked at those that had residual disease after neoadjuvant that didn't include immunotherapy, or those patients that didn't get neoadjuvant therapy, went to surgery, and then were receiving chemotherapy on the back end. I'm going to give you the numbers, because you're right. The 3-year disease-free survival rates were not statistically significant. It was 68.3% among those that had avelumab, 63.2% with those that had observation only. So the difference was 5.1% in favor of avelumab, but it wasn't statistically significant. A p value of 0.1, essentially. But when we looked at the 3-year overall survival rates, we saw the same pattern, those patients with the avelumab doing better, but it was 84.8% overall survival and not, unfortunately, dying, versus 76.3%. So the magnitude of benefit there was 8.5%, so about 3% higher than we saw for disease-free survival, and this was statistically significant.  So is this going to change practice for most patients? I probably don't think so. I think for our patients that have larger tumors that's recognized upfront or have node positivity, we're probably going to want to use neoadjuvant chemo. Being able to get a PCR is very prognostic for our patients and enables us to offer things on the back end, such as PARP inhibitors or further chemotherapy of a different type of chemotherapy. But for our patients that go to surgery and maybe the extent of their disease just isn't recognized initially, this could be an option. Dr. Allison Zibelli: I agree. I think this will be a really useful regimen for patients where we get the surprise lymph node that we weren't expecting, or somebody who comes to us, maybe without seeing the medical oncologist, who got upfront surgery. So I thought this was really interesting. What kind of translational studies do you think we're going to do to try and understand which patients would benefit from avelumab? Dr. Erika Hamilton: Yeah, I think that's a great question, and honestly, it's a question that we haven't really answered in the neoadjuvant setting either. Immunotherapy in breast cancer is just a little bit different than it is in some other diseases. We have a benefit for those patients that are PD-L1 positive in the first line. We really haven't seen benefit for metastatic outside of first line. And then in neoadjuvant, it was among all comers. We don't have to test for PD-L1. And now we have this avelumab data from A-BRAVE. I think the question is, is there's probably a subset of patients that are really getting benefit and a subset that aren't. And I don't know that PD-L1 testing is the right test. We know a lot of people are looking at TILs, so kind of lymphocytes that are infiltrating the tumor, a variety of other kind of immunologic markers. But my guess is that eventually we're going to get smart enough to tease out who actually needs the immunotherapy versus who isn't going to benefit. But we're not quite there yet. Dr. Allison Zibelli: Thank you, Erika, for sharing your valuable insights with us on the ASCO Daily News Podcast today. Dr. Erika Hamilton: Thanks so much for having me.  Dr. Allison Zibelli: And thank you to our listeners for joining us. You'll find the links to all the abstracts discussed today in the transcript of this episode. Finally, if you like this podcast and you value our insights, please take a moment to rate, review, and subscribe wherever you get your podcasts. It really helps other people to find us. So thank you very much for listening today.   Disclaimer:   The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions.   Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.    Find out more about today's speakers:  Dr. Allison Zibelli Dr. Erika Hamilton @ErikaHamilton9   Follow ASCO on social media:  @ASCO on Twitter    ASCO on Facebook    ASCO on LinkedIn      Disclosures: Dr. Allison Zibelli:  None Disclosed   Dr. Erika Hamilton: Consulting or Advisory Role (Inst): Pfizer, Genentech/Roche, Lilly, Daiichi Sankyo, Mersana, AstraZeneca, Novartis, Ellipses Pharma, Olema Pharmaceuticals, Stemline Therapeutics, Tubulis, Verascity Science, Theratechnologies, Accutar Biotechnology, Entos, Fosun Pharma, Gilead Sciences, Jazz Pharmaceuticals, Medical Pharma Services, Hosun Pharma, Zentalis Pharmaceuticals, Jefferies, Tempus Labs, Arvinas, Circle Pharma, Janssen, Johnson and Johnson   Research Funding (Inst): AstraZeneca, Hutchison MediPharma, OncoMed, MedImmune, Stem CentRx, Genentech/Roche, Curis, Verastem, Zymeworks, Syndax, Lycera, Rgenix, Novartis, Millenium, TapImmune, Inc., Lilly, Pfizer, Lilly, Pfizer, Tesaro, Boehringer Ingelheim, H3 Biomedicine, Radius Health, Acerta Pharma, Macrogenics, Abbvie, Immunomedics, Fujifilm, eFFECTOR Therapeutics, Merus, Nucana, Regeneron, Leap Therapeutics, Taiho Pharmaceuticals, EMD Serono, Daiichi Sankyo, ArQule, Syros Pharmaceuticals, Clovis Oncology, CytomX Therapeutics, InventisBio, Deciphera, Sermonix Pharmaceuticals, Zenith Epigentics, Arvinas, Harpoon, Black Diamond, Orinove, Molecular Templates, Seattle Genetics, Compugen, GI Therapeutics, Karyopharm Therapeutics, Dana-Farber Cancer Hospital, Shattuck Labs, PharmaMar, Olema Pharmaceuticals, Immunogen, Plexxikon, Amgen, Akesobio Australia, ADC Therapeutics, AtlasMedx, Aravive, Ellipses Pharma, Incyte, MabSpace Biosciences, ORIC Pharmaceuticals, Pieris Pharmaceuticals, Pieris Pharmaceuticals, Pionyr, Repetoire Immune Medicines, Treadwell Therapeutics, Accutar Biotech, Artios, Bliss Biopharmaceutical, Cascadian Therapeutics, Dantari, Duality Biologics, Elucida Oncology, Infinity Pharmaceuticals, Relay Therapeutics, Tolmar, Torque, BeiGene, Context Therapeutics, K-Group Beta, Kind Pharmaceuticals, Loxo Oncology, Oncothyreon, Orum Therapeutics, Prelude Therapeutics, Profound Bio, Cullinan Oncology, Bristol-Myers Squib, Eisai, Fochon Pharmaceuticals, Gilead Sciences, Inspirna, Myriad Genetics, Silverback Therapeutics, Stemline Therapeutics

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/IPCE information, and to apply for credit, please visit us at PeerView.com/MVX865. CME/MOC/NCPD/IPCE credit will be available until March 4, 2025.A Clinical Compass for Selecting and Sequencing HER2-Targeting Therapies in HER2-Positive Metastatic Breast Cancer: An Update on the Latest Evidence, Guidelines, and Expert Insights In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerReshma L. Mahtani, DO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Agendia; Amgen Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Eisai Inc.; Genentech, Inc.; Gilead Sciences, Inc.; Hologic, Inc.; Lilly; Merck and Co., Inc.; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; Sanofi; Seagen Inc.; Sermonix Pharmaceuticals; and Stemline Therapeutics, Inc.Grant/Research Support from AstraZeneca and Gilead Sciences, Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/CPE/AAPA/IPCE information, and to apply for credit, please visit us at PeerView.com/KBV865. CME/MOC/NCPD/CPE/AAPA/IPCE credit will be available until February 17, 2025.Simplifying the Complicated: An Algorithmic Guide for Clinical Decision-Making in HR+, HER2- EBC and MBC In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by an educational grant from Lilly.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerProfessor Stephen Johnston, MA, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; and Sanofi.Grant/Research Support from AstraZeneca; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; and Puma Biotechnology, Inc.Speakers Bureau participant with AstraZeneca; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; and Pfizer.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/CPE/AAPA/IPCE information, and to apply for credit, please visit us at PeerView.com/KBV865. CME/MOC/NCPD/CPE/AAPA/IPCE credit will be available until February 17, 2025.Simplifying the Complicated: An Algorithmic Guide for Clinical Decision-Making in HR+, HER2- EBC and MBC In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by an educational grant from Lilly.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerProfessor Stephen Johnston, MA, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; and Sanofi.Grant/Research Support from AstraZeneca; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; and Puma Biotechnology, Inc.Speakers Bureau participant with AstraZeneca; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; and Pfizer.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/NCPD/CPE/AAPA/IPCE information, and to apply for credit, please visit us at PeerView.com/KBV865. CME/MOC/NCPD/CPE/AAPA/IPCE credit will be available until February 17, 2025.Simplifying the Complicated: An Algorithmic Guide for Clinical Decision-Making in HR+, HER2- EBC and MBC In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by an educational grant from Lilly.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerProfessor Stephen Johnston, MA, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Puma Biotechnology, Inc.; and Sanofi.Grant/Research Support from AstraZeneca; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Lilly; Novartis Pharmaceuticals Corporation; Pfizer; and Puma Biotechnology, Inc.Speakers Bureau participant with AstraZeneca; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; and Pfizer.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

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CME/MOC/NCPD/CPE/AAPA/IPCE credit will be available until February 17, 2025.Simplifying the Complicated: An Algorithmic Guide for Clinical Decision-Making in HR+, HER2- EBC and MBC In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by an educational grant from Lilly.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. 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Drs. Hope Rugo and Sara Tolaney discuss the promise of antibody-drug conjugates (ADCs) in the treatment of breast cancer, highlighting key trials that shed light on matching the right ADC to the right patient in the right setting. They also explore how combinations and sequencing of ADCs can augment their efficacy, the mechanisms of resistance, and the future potential of biomarkers to predict patient response. TRANSCRIPT Dr. Hope Rugo: Hello, I'm Dr. Hope Rugo, your guest host of the ASCO Daily News Podcast today. I'm a professor of medicine and director of breast oncology and clinical trials education at the University of California, San Francisco's Comprehensive Cancer Center. Antibody-drug conjugates, or ADCs, are rapidly changing the treatment landscape for patients with breast cancer. ADCs consist of antibodies that target tumor-specific antigens on the cell surface, chemical linkers, and cytotoxic payloads that can act powerfully to kill cancer cells. On today's episode, we'll be discussing advances in research to match the right ADC to the right patients and in the right setting. We'll also talk about the next steps, assessing how combinations and sequencing of ADCs can augment their efficacy, improve options for patients, and identify biomarkers in the future to predict how patients will respond so that we can match the right treatment to the right patient and their tumor. We need to gain a better understanding of the mechanisms of resistance that occur upfront as well as under the pressure of treatment.  Joining me for this important discussion is Dr. Sara Tolaney. Dr. Tolaney is an associate professor of medicine at Harvard Medical School, associate director of the Susan Smith Center for Women's Cancer, and chief of the Division of Breast Oncology at the Dana-Farber Cancer Institute in Boston.  You'll find our full disclosures in the transcript of this episode and disclosures of all guests on the podcast are available at asco.org/DNpod. Dr. Tolaney, we're delighted to have you on the podcast today. Thanks for being here. Dr. Sara Tolaney: Thank you so much for having me. I'm looking forward to the discussion. Dr. Hope Rugo: Great! So, we'll move forward, and because we're friends and colleagues, I'm going to refer to you as Sara, and I'm Hope, since we'll dispense with formalities in our discussion.  A lot of the talks that we give about ADCs start out with “a revolution in breast cancer therapy.” And indeed, this is a really exciting time with ADCs as treatment for breast cancer, and we're rapidly moving these agents into earlier disease settings. Can you tell us a little bit about the possibilities and challenges of using ADCs for the treatment of breast cancer today? Dr. Sara Tolaney: It's interesting that you say antibody-drug conjugates as revolutionizing outcomes of breast cancer, which I think is true. But on the flip side, I think it's also bringing up a lot of questions about how to use them, when to use them, and how to manage side effects. So there are a lot of good strengths for these antibody-drug conjugates, but a lot of unknowns that we're still trying to figure out. We had an older antibody-drug conjugate T-DM1 that we were all very familiar with that for years had been a treatment that we used very commonly in metastatic disease and now even use in early breast cancer, and I think has changed outcomes for patients. But over time, we've been able to develop newer antibody-drug conjugates as the technology has really evolved so that these agents now are able to deliver a lot of chemotherapy into a cancer cell. We're seeing very high drug-to-antibody ratios, and we're also seeing that these drugs can function via bystander effect, whereas T-DM1, for example, was not able to do that. But our newer ADCs, like sacituzumab govitecan or trastuzumab deruxtecan, are agents that do allow chemotherapy to get into that cancer cell, but also to get into neighboring cells.  And I think the technology evolution in being able to build these so-called next-generation ADCs has allowed for really unprecedented efficacy that we've not seen before. And it's also allowed us to develop these drugs in a way that's been different. Originally, we were developing T-DM1 to turn off HER2 signaling and to deliver chemotherapy into a HER2 cell. At least that's what we thought originally. And now we're really evolving so that we can just find a tiny bit of protein on a cancer cell and use it as a target, really in a subtype-agnostic way. And I think it's just a different way of thinking about how to use these agents to really deliver a lot of chemotherapy into cancer cells and have very robust efficacy. Dr. Hope Rugo: Yes, it is fascinating that some of the suppositions that we made with the first ADC don't seem to really hold true as well. And maybe they hold true in varying levels for the different ADCs. For example, this bystander effect is thought to allow us to target cells that have very low expression of the receptor that can be internalized even lower than our ability to detect these receptors by immunohistochemistry. And maybe we'll talk about that in a little bit.   But first, you mentioned already sacituzumab and trastuzumab deruxtecan, the ADCs that are currently approved for breast cancer. But can you tell us a little more about those ADCs and the key trials that have led to approval of these targeted agents? Dr. Sara Tolaney: Yes, I think when we first saw the data that came out with T-DXd and DESTINY-Breast01, I think my jaw dropped because I had never seen a waterfall plot like that. This was a single-arm study that looked at T-DXd in patients with very heavily pretreated metastatic HER2-positive breast cancer and saw very high response rates of over 60% and a clinical benefit rate of almost 98%, meaning that almost every single patient who got the drug and had a median of six prior lines of therapy had reduction in tumor size. And that's unreal. I think it was revolutionary in the sense that we had never seen that kind of activity in such a pretreated population. The agent was studied in other registration trials, DESTINY-Breast03, which looked at T-DXd and compared it head to head with T-DM1 in a predominantly second-line metastatic HER2-positive population, and here, again, unprecedented results. I've never seen a p value like that or a hazard ratio of, again unreal, of a little under 0.3 and seeing a 28-month PFS with T-DXd relative to just a little under 7 months PFS with T-DM1. We have never seen patients with metastatic HER2-positive breast cancer have a PFS that long. Even in CLEOPATRA, it's a little under 19 months in the first-line setting, where people were predominantly naïve to HER2-directed therapies. This, again, is really changing outcomes for patients.   But then, I think, when we go to the next step, we studied T-DXd in patients with HER2-positive breast cancer and it had again these unprecedented results. But there was some early data suggesting that it could even work in tumors that weren't truly HER2-positive but what we call HER2-low, meaning that they weren't HER2/3+, they weren't HER2-0 but they were 1+ to 2+ and not FISH amplified. And so even with a little bit of protein there, they were seeing activity in the early phase studies and so it led to DESTINY-Breast04, which compared T-DXd to chemotherapy of physician's choice in people who had had one or two prior lines of chemotherapy in the metastatic setting. It was predominantly geared to look at outcomes in hormone receptor-positive breast cancer. But there was a small group of 58 patients with triple-negative disease that were also included in that trial. And here again, a very unprecedented outcome seeing a response rate of about 50%, which, again, we never see in pretreated hormone receptor-positive disease. And a PFS of 10 months, and again, these are people who already had one or two prior lines of chemotherapy. So it's, again, really changing outcomes. And so now I think it leads us to a lot of other questions that we are addressing in trials - can this drug work even if the tumor has maybe no HER2 expression, what about HER2-0, what about HER2-ultra low, meaning a little bit of staining but not quite 1+. And so these are questions that I think we will need to address and there are studies that will help us address that. On the flip side, we saw sacituzumab govitecan get developed in breast cancer. Initially, we saw very impressive results from a single arm study of sacituzumab in metastatic triple-negative disease where we saw response rates of a little over 30%. These are patients who were very heavily pretreated with metastatic triple negative breast cancer where, unfortunately, response rates end up being in a 5% range so it was a home run in that setting. So that led to the ASCENT trial, which compared sacituzumab govitecan to treatment of physician's choice therapy and that study really enrolled people who were, in essence, second line and beyond in the metastatic triple-negative setting and showed almost triple progression free survival, in essence, doubled overall survival. So again, very robust efficacy leading to confirming its approval. And then we saw data from TROPiCS-02, which looked at sacituzumab in metastatic hormone receptor-positive disease and also showed improvements in both progression free and overall survival. And this was in pre-treated populations of 2 to 4 prior lines of chemotherapy. These agents, again, have established robust efficacy, and so now the idea is can we move these drugs earlier in development into earlier line settings and can we even move these agents into the early disease setting and potentially cure more patients? So hopefully, we'll figure out ways to make that happen. Dr. Hope Rugo: Yeah, that was a great summary of this exciting data. And I think we really got an idea of what waterfall plots could tell us from DESTINY-Breast01 where you could count the number of patients whose cancers grew with therapy on one hand. It's been a huge advance. I think it's where we get this “revolution” even in patients with a median of 4 lines of prior chemo, and, in the ASCENT trial, we were able to see this improvement and survival in the hardest-treated subset of metastatic breast cancer triple negative disease. And then the remarkable data in HER2-positive and HER2-low breast cancer hormone receptor positive disease. We're really covering all of the subset of breast cancers.   When we introduce new therapies though, and of course, our interest is moving them earlier as lines of therapy in the metastatic setting, we really have to think about the adverse events and how those are going to affect their patients, and balancing the risk benefit ratio. Obviously when the benefit is so huge, we're more thinking about how do we proactively manage these side effects, educate our patients, use prophylaxis when possible. Can you share with us some of your insights on management strategies for toxicities?  Dr. Sara Tolaney: You bring up a very good point, and I will say the ADCs were designed with the idea being that we could deliver a ton of chemotherapy into a cancer cell. So obviously, my hope had been that we weren't going to see a lot of chemotherapy-like side effects because the goal was to try to spare normal cells of these side effects. But unfortunately, we do see that these agents do have real toxicities, and I think that is an important message. So, for example, with sacituzumab, for people who have hair going into it, they will lose their hair during the course of treatment, and so that's important to make patients aware of. It can lower blood counts, and about 50% of patients who are on sacituzumab will end up needing growth factor support while they're on treatment. So, that is again something that needs to be monitored and managed. But usually, we're pretty good at managing neutropenia, and with the growth factor support, I find that it actually works really well.  Another thing with sacituzumab is the potential risk of diarrhea, but most of the diarrhea is low-grade diarrhea. It's rare that you get someone who has high-grade diarrhea with sacituzumab. Usually, I find it works to just instruct patients to use loperamide as needed. And again, usually that works well. And certainly when needed, dose modification can also help with these side effects and so it is important to keep in mind that this is another option. With T-DXd, one thing that we do have to keep in mind as an unusual side effect is the potential risk of interstitial lung disease. We see that in about 10% to 15% of patients getting T-DXd. That is something that we do have to be very mindful of. For the most part it is low-grade ILD. But there are rare occasions where there have been deaths from ILD. And we're seeing with some of the newer trials, the death rate is usually under 1%, but it is a real potential risk. And so it is really important to counsel patients when getting T-DXd about this potential side effect, that way they are good about communicating with you if they get any new symptoms, such as shortness of breath or dry cough, to get you aware of it and can work it up and get imaging certainly if that occurs.  And then I think the management for ILD is a little unique and a little different truthfully than the way we manage pneumonitis from other drugs. Normally, when I am treating patients who develop pneumonitis, even if it is mildly symptomatic, we often will hold treatment, give steroids, and rechallenge them when it gets better. But with T-DXd, if anyone develops symptomatic pneumonitis, you actually have to permanently discontinue the T-DXd per the guidelines because we just don't know the safety of being able to rechallenge that patient once that pneumonitis resolves. For grade 1 ILD, meaning someone who has, for example, ground glass changes seen on imaging but doesn't have any symptoms, you have to hold the drug and wait until those imaging findings resolve and then you can restart. I usually do treat grade 1 ILD patients with steroids with the hope being that maybe it will allow for the pneumonitis to resolve more quickly, although in truth I don't know if that's the case. I have just taken that approach because I don't like leaving patients off the drug for too long if not needed. Again, I typically treat them with steroids, reimage in three to four weeks, and see if I'm able to restart. If they resolve within 28 days, you can restart at the same dose. If it takes longer to resolve, you need to dose modify.  And then I think the other big thing with T-DXd is to know that it is categorized as a highly emetogenic agent. Most of us are using three-drug prophylaxis, which I think works really well. It is also important to realize that there can be some delayed nausea, which is a little unusual with some of our other agents. And so to warn patients about that and I find that use of olanzapine or ondansetron for the delayed nausea tends to work pretty well.  Hope, do you have any pearls for us? Obviously, you are very experienced in using these agents; are there any things you would recommend for the management of ADCs?  Dr. Hope Rugo: Yes, it's such a great question and an important area because, particularly as we are using these agents earlier, we really need to have strategies for both how long to continue as well as manage the toxicities. I agree with the nausea, olanzapine has been really a great addition, and using a triplet as initial premedication makes a big difference for T-DXd and other deruxtecan ADCs that are in the pipeline. And then I think that the ILD issue, we're really learning more about the risk factors as well as retreatment. And hopefully, we'll have more data this year at ESMO Breast and maybe ASCO on retreatment for grade 1. We certainly now do not have any data on the safety of retreatment for grade 2, so that is really not accepted now. For sacituzumab, I think the interesting area is the metabolism and the impact. So with neutropenia, as we move the drug earlier, it's easier and easier to manage, we see less severe neutropenia. We can give growth factors, which we are all good at in oncology. But I think the question about managing diarrhea and who is at risk still exists. Understanding pharmacogenomics and UGT1A1 is an interesting area where patients who have diarrhea could be tested to see if they are poor metabolizers which affects a little under 10% of the overall population. Because in that group, you could give less drug and get the same benefit with less toxicity. So I think this is all very interesting. It is important for providers and patients to be educated so that we can manage this appropriately. And I think you gave an excellent overview.   We have new agents in the pipeline also and maybe we'll talk about those next, and then we'll talk a little bit about sequencing and resistance, as well as the unmet need for brain metastases. So lots of areas to talk about. There are a number of TROP-2 ADCs that are in the pipeline, and one that has presented phase III data, datopotamab deruxtecan. But other studies are being developed with new TROP-2 ADCs as well. But then there are a huge number of ADCs there with new targets, for example, immune effector targets, and new payloads, even immunotherapy and two different payloads or bispecific antibodies. And then there is interest in combining ADCs with immunotherapy and PARP inhibitors. We saw data in bladder cancer, I think it was bladder cancer, with combined 2 different ADCs at ESMO in 2023. So a lot of new approaches. How are we going to manage this moving forward? And where do you think we are going to position some of these next sort of "me-too" drugs?  Dr. Sara Tolaney: It's an excellent question, and you're right, the field is exploding with new antibody- drug conjugates. So, it's going to leave us with this conundrum of what to do. And you brought up the really interesting example of the fact that we have an approved TROP-2 ADC, we have as sacituzumab govitecan, and for example, we've recently seen some really exciting data come out from TROPION-Breast01 looking at another TROP-2 ADC, datopotamab deruxtecan or Dato-DXd where that ADC performed better than chemotherapy in a head-to-head trial in terms of progression-free survival in a hormone receptor-positive population. Then there's another TROP-2 ADC, moving forward in development moving to phase III that Merck is developing MK-2870. All three of these ADCs are targeting TROP-2 and have a TOPO 1 payload. So, it leaves you with the question of how do you think about that? Is there going to be a role for using serial TROP-2 ADCs? Could one work after the other, even when they have very similar payloads? How are we going to incorporate them? How do you pick one over the other? So, it is going to be tricky for us as we get more and more of these agents. I think we're all excited about seeing ADCs that may have different targets and different payloads, where maybe we will see that sequential utilization will have robust efficacy if we swap things out. Again, we don't have data here yet, but I think there are other agents in development. For example, you could think of like, disitamab vedotin targets HER2 and has an MMAE payload. So, could it be that someone progresses on T-DXd for HER2-low, but then could go on to disitamab vedotin? How will that work? So, we have a lot to learn, but it's really nice to have so many options.  Dr. Hope Rugo: Yeah, it'll be interesting to see whether or not we select the ADC based on a rational understanding of the tumor and the patient, or whether it's simply what's easier to give and has the right toxicity for that patient.  So, that sort of brings us to our next topic, which is how are we going to sequence these agents? How are we going to understand the mechanisms of ADC resistance? At San Antonio in 2023, we saw a presentation where there was a top-alteration, and the patient had a really long response to a top-directed ADC, or an agent that carried a topoisomerase inhibitor. And that really struck me that we're going to see these alterations. There was a fresh autopsy study that suggested that the alterations may be different in different organ sites of disease. How are we going to figure this out? Dr. Sara Tolaney: Yeah, I also was really puzzled to see those data from San Antonio where we've sort of simplified ADC resistance in our heads to say, well, maybe someone becomes resistant because they lose target expression, or maybe someone becomes resistant because they've developed resistance to the payload, kind of like the way we think of someone developing resistance to getting chemotherapy. But obviously, it's probably far more complex than that. With these ADCs, they need to be able to internalize the ADC and could there be mechanisms of resistance related to the internalization process? So, I think there are lots of potential areas where resistance could be occurring. I think, we don't understand it very well. We've seen patients, for example, who have responded. This is just anecdotal, but we have data, for example looking at, Dato-DXd in the phase 1 triple-negative study where there were some patients who responded despite having progressed on sacituzumab. Well, why is that? You would think if it's target resistance or payload resistance, it would be the same target and a very similar payload. So, why would those drugs work one after the other? And that's why I think we just don't understand this well enough at this point in time.   So, it's clearly an area where more research is needed because it does have significant implications on how we think about using these drugs sequentially. We will need to understand these resistance mechanisms because there do seem to be some rare patients who benefit from these sequencing strategies and then others who don't. So, it would be nice to be able to figure this out and hopefully in the future, we'll be able to test patients and know what drugs to give them. But I think we're far off from that, unfortunately, right now. Dr. Hope Rugo: Yeah, it does seem to be a relatively elusive approach, and I think, in part, it's due to the heterogeneity of cancer. And maybe, as we're better and better at analyzing tumor cells in the blood, which are a rare group, and ctDNA, which, of course, we do now to look for mutations, maybe that'll be an approach that we'll be able to take. And also, of course, moving the drugs earlier into the disease setting with less heterogeneity and mechanisms of resistance might help as well.  I was fascinated by the fact that although the PFS to the first ADC seems to be overall much greater than the PFS to the second ADC, when you sequence them, there are a few patients who have a longer PFS with the second, even if these are just sacituzumab T-DXd sequencing in various directions. So, it's clearly very complex. And right now, I think we're just sequencing and we don't really know how to do it. We just choose what we think is best for that patient first and go on to the next one later, which is interesting. And one of the choices might be treating brain metastases, which of course remains a huge unmet need. And if we could find effective treatment for brain metastases, maybe we could also prevent them in some patients more. What do we know about the central nervous system (CNS) penetration of ADCs and the clinical results? Dr. Sara Tolaney: At first, we were not optimistic that these drugs would have activity in the brain because we thought that these were very large agents that probably couldn't penetrate into the blood-brain barrier. But in fact, I think we were all very excited to see that there is actually data suggesting that these drugs can actually have robust efficacy in the CNS in patients who have active brain metastases. And so what we've seen so far is data with trastuzumab deruxtecan or T-DXd, there have been some trials that have been done, including studies like DEBRA and TUXEDO, which have looked at T-DXd in patients who have active brain metastases and are showing very robust response rates within the CNS. So, we're seeing intracranial response rates on the order of 40% to 50%. And clinically, this is what we're seeing as well. These are smaller studies and there's a larger trial, DESTINY-Breast12, which will hopefully validate the robust efficacy in the CNS with T-DXd. So, again, it's really nice to see this.  To your point, though, one area that I'm curious about, as you were alluding to, is will these drugs be able to prevent CNS disease? And I think that is a very different question because here the blood-brain barrier is not intact when patients have progressive brain metastases, and so these ADCs are causing robust activity. But if you look, for example, and I'll be curious to see what happens, DESTINY-Breast05 is looking at T-DXd in the post preoperative setting for patients who have residual disease and comparing it to T-DM1. And unfortunately, we saw that T-DM1 was not able to prevent brain metastases when looking at data from KATHERINE, where in fact, rates of CNS as the first site of recurrence were similar with T-DM1 and trastuzumab. So, now we'll be interested to see, will it be any different with T-DXd? Will T-DXd be able to have any role in prevention? I think we haven't seen anything like that with ADCs to date, so that would be a paradigm shift in our way of thinking.  Right now, there are strategies being taken from a prevention standpoint of trying to add a tyrosine kinase inhibitor in that early-stage setting, such as what is being done in the COMPASS-RD trying to add tucatinib to T-DM1 to see if that would do it. But again, we really need to understand, again, how these drugs work, particularly when the blood-brain barrier may not be intact. But again, very exciting data with T-DXd in an ongoing trial, actually through SWOG looking at sacituzumab for patients with CNS disease. And we've seen some preliminary data with sacituzumab showing that it actually does penetrate into the brain when they've looked at drug levels in the tumor in the brain, comparing it to plasma, it actually looks similar. So, we know it's getting in there and we'll have more robust efficacy data, hopefully coming soon. Dr. Hope Rugo: Yeah, that was a great summary of that data. It's been exciting also to see some responses in patients with leptomeningeal disease as well, where we've really been struggling with anything that works for more than a few weeks or months at the most. So I'm holding out great hope that we're going to see a big difference because even though TDM-1 had some efficacy, it was nothing like what we're seeing with T-DXd. So we'll see. And the same with sacituzumab with triple negative disease, where sometimes brain metastases can be an isolated site of recurrence, even in patients who have a pathologic complete response. So it has been a big challenge.  So I think that what we've learned from you is a lot about the mechanisms and the data about these new ADCs, the tremendous hope that these are bringing to our patients, but also the really exciting new approaches with new payloads, new targets of drugs that are in development, as well as potentially some different ADCs that have the same target and similar mechanisms of action of this payload. Really fascinating to hear about this, the future work on sequencing, on mechanisms of resistance, and on brain metastases. We have, of course, 2 prospective trials that we'll be looking at sequencing, one with T-DXd and Dato-DXd, and one registry trial with T-DXd and sacituzumab govitecan in the US. So that's also going to, I think, provide us with some important information.  We could talk for a long time about this, but I just wonder if you have any closing comments to sum up your thoughts.  Dr. Sara Tolaney: I think you did a great job leading us through thinking about ADCs, and I think it'll be really interesting to see what happens in the future. While again, these agents have become a standard for us for patients with metastatic disease, I'm going to be curious to see how everything evolves and to see if we'll be able to substitute chemotherapy with ADCs in early disease settings and change outcomes. Will we be able to have novel combinations? Will we be able to sequence these drugs one after another? Will we actually have biomarker predictors to help us sort out which drug to give when? So, still a lot to learn, but clearly a very exciting field right now. Dr. Hope Rugo: Indeed. Sara, thank you for sharing your valuable insights with us today on the ASCO Daily News Podcast on your great work to develop novel therapies for breast cancer. It's always a pleasure to talk to you, and even greater to work with you on the future progress of treatment for breast cancer. Dr. Sara Tolaney: Thank you so much, Hope. Again, really nice to always discuss these data with you. I always learn a lot, so thank you. Dr. Hope Rugo: Thank you. And thank you to our listeners for joining us today. You'll find a link to all of the studies discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experiences, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of a product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.   Follow today's speakers:   Dr. Hope Rugo  @hoperugo  Dr. Sara Tolaney @stolaney1     Follow ASCO on social media:   @ASCO on Twitter    ASCO on Facebook    ASCO on LinkedIn      Disclosures:   Dr. Hope Rugo:  Consulting or Advisory Role: Napo Pharmaceuticals, Puma Biotechnology, Mylan, Eisai, Daiichi Sankyo Research Funding (Inst.): OBI Pharma, Pfizer, Novartis, Lilly, Genentech, Merck, Daiichi Sankyo, Sermonix Pharmaceuticals, AstraZeneca, Gilead Sciences, Astellas Pharma, Talho Oncology, Veru, GlaxoSmithKline, Hoffmann-LaRoche AG/Genentech, Inc, Stemline Therapeutics Travel, Accommodations, Expenses: Merck, AstraZeneca   Dr. Sara Tolaney: Consulting or Advisory Role: Novartis, Pfizer, Merck, AstraZeneca, Genentech, Eisai, Sanofi, Bristol-Myers Squibb, Seattle Genetics, CytomX Therapeutics, Daiichi Sankyo, Immunomedics/Gilead, BeyondSpring Pharmaceuticals, OncXerna Therapeutics, Zymeworks, Zentalis, Blueprint Medicines, Reveal Genomics, ARC Therapeutics, Umoja Biopharma, Menarini/Stemline, Aadi Bio, Artio Biopharmaceuticals, Incyte Corp, Zetagen, Bayer, Infinity Therapeutics, Jazz Pharmaceuticals, Natera, Tango Therapeutics, Systimmune, eFFECTOR Therapeutics, Hengrui Pharmaceutical (USA), Sumitovant Biopharma Research Funding (Inst.): Genentech/Roche, Merck, Exelixis, Pfizer, Lilly, Novartis, Bristol-Myers Squibb, Eisai, AstraZeneca, NanoString Technologies, Seattle Genetics, OncoPep, Gilead Travel, Accommodations, Expenses: Eli Lilly, Sanofi, Gilead Sciences

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/GHA865. CME/MOC/AAPA credit will be available until January 6, 2025.Mastering the Art of Precision in the Treatment of HR+ Early and Metastatic Breast Cancer: Risk Assessment, Prognostic Testing, and Selection and Sequencing of Therapies In support of improving patient care, this activity has been planned and implemented by PVI, PeerView Institute for Medical Education, GRASP, and Living Beyond Breast Cancer. PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Lilly, and Olema Pharmaceuticals.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, Inc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biopharma Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, Inc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer Ingelheim Pharmaceuticals, Inc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serono, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; ImmunoGen, Inc.; Immunomedics, Inc.; Incyte; Infinity Pharmaceuticals, Inc.; InvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, Inc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; MedImmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove Inc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr Immunotherapeutics; Plexxikon; Radius Health, Inc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen Inc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, Inc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; TapImmune Inc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks Inc. (all paid to institution).Faculty/PlannerKomal Jhaveri, MD, FACP, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc.; AstraZeneca; Blueprint Medicines; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Eisai Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Jounce Therapeutics, Inc.; Lilly/Loxo Oncology; Menarini Group/Stemline Therapeutics; Novartis Pharmaceuticals Corporation; Pfizer; Scorpion Therapeutics; Seattle Genetics, Inc. (Seagen Inc.); Sun Pharma Advanced Research Company; and Taiho Oncology, Inc.Grant/Research Support from ADC Therapeutics SA; AstraZeneca; Blueprint Medicines; Debiopharm; Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; Novita Pharmaceuticals, Inc.; Pfizer; Puma Biotechnology, Inc.; Scorpion Therapeutics; and Zymeworks Inc.Faculty/PlannerHope S. Rugo, MD, FASCO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Daiichi Sankyo, Inc.; Mylan/Viatris Inc.; Napo Pharmaceuticals, Inc.; and Puma Biotechnology, Inc.Grant/Research Support from AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; Lilly; Merck & Co., Inc.; Novartis Pharmaceuticals Corporation; OBI Pharma, Inc.; Pfizer; Pionyr Immunotherapeutics; Sermonix Pharmaceuticals; and Stemline Therapeutics.Faculty/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, downloadable Practice Aids, slides, and complete CME/NCPD/CE/CPE/AAPA information, and to apply for credit, please visit us at PeerView.com/BUC865. CME/NCPD/CE/CPE/AAPA credit will be available until December 9, 2024.Antibody–Drug Conjugates, the Ultimate Weapons Against Solid Tumors: Latest Progress, Future Possibilities, and Implications for Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca and Daiichi Sankyo, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerBeth Sandy, MSN, CRNP, FAPO, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie Inc. and Janssen Pharmaceuticals, Inc.Speakers Bureau participant with Amgen Inc.; AstraZeneca; Jazz Pharmaceuticals, Inc.; Lilly; Merck & Co., Inc.; and Takeda Pharmaceutical Company Limited.Faculty/PlannerJamie Carroll, APRN, CNP, MSN, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Lilly; Novartis Pharmaceuticals Corporation; Pfizer; Sermonix Pharmaceuticals; and Talzenna.Speakers Bureau participant with Horizon CME and OncLive.Faculty/PlannerElizabeth Prechtel Dunphy, DNP, RN, ANP-BC, AOCN, has a financial interest/relationship or affiliation in the form of:Speakers Bureau participant with Incyte.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/JTS865. CME/MOC/AAPA credit will be available until November 13, 2024.Revolutionizing Solid Tumor Treatment, Unleashing the Potential of Antibody–Drug Conjugates: How to Make the Most of the Latest Clinical Evidence to Enhance Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Daiichi Sankyo, Inc., and Gilead Sciences, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Speaker for AstraZeneca; Daiichi Sankyo, Inc.; and F. Hoffmann-La Roche Ltd/Genentech, Inc.Faculty/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, lnc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biophanna Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, lnc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer lngelheim Pharmaceuticals, lnc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serano, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; lmmunoGen, Inc.; lmmunomedics, Inc.; lncyte; Infinity Pharmaceuticals, Inc.; lnvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, lnc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; Medlmmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove lnc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr lmmunotherapeutics; Plexxikon; Radius Health, lnc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen lnc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, lnc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; Taplmmune lnc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks (all paid to institution).Faculty/PlannerYelena Y. Janjigian*, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie, Inc.; AmerisourceBergen; Arcus Biosciences; AskGene Pharma, Inc.; Astellas Pharma Inc.; AstraZeneca; Basilea Pharmaceutica Ltd.; Bayer Corporation; Bristol Myers Squibb; Daiichi Sankyo Inc.; GlaxoSmithKline; Guardant Health; Imugene Limited; Inspirna, Inc.; Lilly; Merck and Co., Inc.; Merck Serono; Mersana Therapeutics Inc.; Pfizer; Rgenix Inc.; Seagen Inc.; Silverback Therapeutics (ARS Pharmaceuticals) and Zymeworks Inc.Grant/Research Support from Arcus Biosciences; AstraZeneca; Bayer HealthCare Pharmaceuticals, Inc.; Bristol Myers Squibb; Cycle for Survival; Fred's Team; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Inspirna, Inc.; Lilly; Merck and Co., Inc.; National Cancer Institute; Transcenta Holding; and U.S. Department of Defense.Stock Shareholder in Inspirna, Inc.Faculty/PlannerAntonio Passaro, MD, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; GSK; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Sharp and Dohme; Mundipharma International; Novartis AG; Pfizer; and Takeda Pharmaceutical Company Limited.Grant/Research Support from ArriVent Biopharma; AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Serono; Merck Sharp and Dohme; Mirati Therapeutics, Inc.; Pfizer; and RMC Pharmaceutical Solutions Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/JTS865. CME/MOC/AAPA credit will be available until November 13, 2024.Revolutionizing Solid Tumor Treatment, Unleashing the Potential of Antibody–Drug Conjugates: How to Make the Most of the Latest Clinical Evidence to Enhance Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Daiichi Sankyo, Inc., and Gilead Sciences, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Speaker for AstraZeneca; Daiichi Sankyo, Inc.; and F. Hoffmann-La Roche Ltd/Genentech, Inc.Faculty/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, lnc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biophanna Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, lnc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer lngelheim Pharmaceuticals, lnc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serano, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; lmmunoGen, Inc.; lmmunomedics, Inc.; lncyte; Infinity Pharmaceuticals, Inc.; lnvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, lnc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; Medlmmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove lnc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr lmmunotherapeutics; Plexxikon; Radius Health, lnc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen lnc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, lnc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; Taplmmune lnc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks (all paid to institution).Faculty/PlannerYelena Y. Janjigian*, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie, Inc.; AmerisourceBergen; Arcus Biosciences; AskGene Pharma, Inc.; Astellas Pharma Inc.; AstraZeneca; Basilea Pharmaceutica Ltd.; Bayer Corporation; Bristol Myers Squibb; Daiichi Sankyo Inc.; GlaxoSmithKline; Guardant Health; Imugene Limited; Inspirna, Inc.; Lilly; Merck and Co., Inc.; Merck Serono; Mersana Therapeutics Inc.; Pfizer; Rgenix Inc.; Seagen Inc.; Silverback Therapeutics (ARS Pharmaceuticals) and Zymeworks Inc.Grant/Research Support from Arcus Biosciences; AstraZeneca; Bayer HealthCare Pharmaceuticals, Inc.; Bristol Myers Squibb; Cycle for Survival; Fred's Team; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Inspirna, Inc.; Lilly; Merck and Co., Inc.; National Cancer Institute; Transcenta Holding; and U.S. Department of Defense.Stock Shareholder in Inspirna, Inc.Faculty/PlannerAntonio Passaro, MD, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; GSK; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Sharp and Dohme; Mundipharma International; Novartis AG; Pfizer; and Takeda Pharmaceutical Company Limited.Grant/Research Support from ArriVent Biopharma; AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Serono; Merck Sharp and Dohme; Mirati Therapeutics, Inc.; Pfizer; and RMC Pharmaceutical Solutions Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/JTS865. CME/MOC/AAPA credit will be available until November 13, 2024.Revolutionizing Solid Tumor Treatment, Unleashing the Potential of Antibody–Drug Conjugates: How to Make the Most of the Latest Clinical Evidence to Enhance Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Daiichi Sankyo, Inc., and Gilead Sciences, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Speaker for AstraZeneca; Daiichi Sankyo, Inc.; and F. Hoffmann-La Roche Ltd/Genentech, Inc.Faculty/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, lnc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biophanna Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, lnc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer lngelheim Pharmaceuticals, lnc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serano, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; lmmunoGen, Inc.; lmmunomedics, Inc.; lncyte; Infinity Pharmaceuticals, Inc.; lnvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, lnc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; Medlmmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove lnc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr lmmunotherapeutics; Plexxikon; Radius Health, lnc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen lnc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, lnc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; Taplmmune lnc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks (all paid to institution).Faculty/PlannerYelena Y. Janjigian*, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie, Inc.; AmerisourceBergen; Arcus Biosciences; AskGene Pharma, Inc.; Astellas Pharma Inc.; AstraZeneca; Basilea Pharmaceutica Ltd.; Bayer Corporation; Bristol Myers Squibb; Daiichi Sankyo Inc.; GlaxoSmithKline; Guardant Health; Imugene Limited; Inspirna, Inc.; Lilly; Merck and Co., Inc.; Merck Serono; Mersana Therapeutics Inc.; Pfizer; Rgenix Inc.; Seagen Inc.; Silverback Therapeutics (ARS Pharmaceuticals) and Zymeworks Inc.Grant/Research Support from Arcus Biosciences; AstraZeneca; Bayer HealthCare Pharmaceuticals, Inc.; Bristol Myers Squibb; Cycle for Survival; Fred's Team; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Inspirna, Inc.; Lilly; Merck and Co., Inc.; National Cancer Institute; Transcenta Holding; and U.S. Department of Defense.Stock Shareholder in Inspirna, Inc.Faculty/PlannerAntonio Passaro, MD, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; GSK; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Sharp and Dohme; Mundipharma International; Novartis AG; Pfizer; and Takeda Pharmaceutical Company Limited.Grant/Research Support from ArriVent Biopharma; AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Serono; Merck Sharp and Dohme; Mirati Therapeutics, Inc.; Pfizer; and RMC Pharmaceutical Solutions Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

This content has been developed for healthcare professionals only. Patients who seek health information should consult with their physician or relevant patient advocacy groups.For the full presentation, slides, and complete CME/MOC/AAPA information, and to apply for credit, please visit us at PeerView.com/JTS865. CME/MOC/AAPA credit will be available until November 13, 2024.Revolutionizing Solid Tumor Treatment, Unleashing the Potential of Antibody–Drug Conjugates: How to Make the Most of the Latest Clinical Evidence to Enhance Patient Care In support of improving patient care, PVI, PeerView Institute for Medical Education, is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.SupportThis activity is supported by independent educational grants from AstraZeneca, Daiichi Sankyo, Inc., and Gilead Sciences, Inc.Disclosure PolicyAll relevant conflicts of interest have been mitigated prior to the commencement of the activity.Faculty/Planner DisclosuresChair/PlannerPaolo Tarantino, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Daiichi Sankyo, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Gilead Sciences, Inc.; and Lilly.Grant/Research Support from AstraZeneca.Speaker for AstraZeneca; Daiichi Sankyo, Inc.; and F. Hoffmann-La Roche Ltd/Genentech, Inc.Faculty/PlannerErika Hamilton, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for Arcus Biosciences, Inc.; Arvinas, Inc.; AstraZeneca; Daiichi Sankyo, Inc.; Deciphera Pharmaceuticals, lnc.; Ellipses Pharma; F. Hoffmann-La Roche Ltd/Genentech, Inc.; Greenwich LifeSciences, Inc.; iTeos Therapeutics; Janssen Pharmaceuticals, Inc.; Lilly; Loxo Oncology; Mersana Therapeutics; Novartis Pharmaceuticals Corporation; Orum Therapeutics; Pfizer; Relay Therapeutics; Seagen Inc.; and Verascity Science (all paid to institution).Grant/Research Support from AbbVie Inc.; Accutar Biotechnology Inc; Acerta Pharma; ADC Therapeutics SA; Akeso Biophanna Co., Ltd.; Amgen Inc.; Aravive; Artios Pharma; Arvinas, Inc.; AstraZeneca; AtlasMedx, Inc.; BeiGene, lnc.; Black Diamond Therapeutics, Inc.; Bliss Biopharmaceutical (Hangzhou) Co., Ltd.; Boehringer lngelheim Pharmaceuticals, lnc.; Cascadian Therapeutics; Clovis Oncology; Compugen; Cullinan Oncology, Inc.; Curis, Inc.; CytomX Therapeutics, Inc.; Daiichi Sankyo, Inc.; Dana-Farber Cancer Institute; Dantari; Deciphera Pharmaceuticals, Inc.; Duality Biologics; eFFECTOR Therapeutics, Inc.; Ellipses Pharma; Elucida Oncology, Inc.; EMD Serano, Inc.; F. Hoffmann-La Roche Ltd/Genentech, Inc.; FUJIFILM Pharmaceuticals U.S.A., Inc.; G1 Therapeutics, Inc.; H3 Biomedicine Inc.; Harpoon Therapeutics; HUTCHMED (China) Limited; lmmunoGen, Inc.; lmmunomedics, Inc.; lncyte; Infinity Pharmaceuticals, Inc.; lnvestisBio; Jacobio Pharmaceuticals Group Co., Ltd.; K-Group Beta, lnc.; Karyopharm; Lilly; Loxo Oncology; Lycera; MabSpace Biosciences Co., Ltd.; MacroGenics, Inc.; Medlmmune, LLC; Mersana Therapeutics; Merus; Millennium Pharmaceuticals, Inc.; Molecular Templates, Inc.; Novartis Pharmaceuticals Corporation; Nucana; Olema Oncology; OncoMed Pharmaceuticals, Inc.; Onconova Therapeutics; Oncothyreon; ORIC Pharmaceuticals, Inc.; Orinove lnc.; Pfizer; PharmaMar; Pieris Pharmaceuticals, Inc.; Pionyr lmmunotherapeutics; Plexxikon; Radius Health, lnc.; Regeneron Pharmaceuticals Inc.; Relay Therapeutics; Repertoire Immune Medicines; Rgenix Inc.; Seagen lnc.; Sermonix Pharmaceuticals; Shattuck Labs Inc.; Stemcentrx, Inc.; Sutro Biopharma, lnc.; Syndax; Syros Pharmaceuticals, Inc.; Taiho Oncology, Inc.; Taplmmune lnc; TESARO, Inc.; Tolmar Pharmaceuticals, Inc.; Torque Therapeutics, Inc.; Treadwell Therapeutics; Verastem, Inc.; Vincerx Pharma; zenithepigenetics; and Zymeworks (all paid to institution).Faculty/PlannerYelena Y. Janjigian*, MD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AbbVie, Inc.; AmerisourceBergen; Arcus Biosciences; AskGene Pharma, Inc.; Astellas Pharma Inc.; AstraZeneca; Basilea Pharmaceutica Ltd.; Bayer Corporation; Bristol Myers Squibb; Daiichi Sankyo Inc.; GlaxoSmithKline; Guardant Health; Imugene Limited; Inspirna, Inc.; Lilly; Merck and Co., Inc.; Merck Serono; Mersana Therapeutics Inc.; Pfizer; Rgenix Inc.; Seagen Inc.; Silverback Therapeutics (ARS Pharmaceuticals) and Zymeworks Inc.Grant/Research Support from Arcus Biosciences; AstraZeneca; Bayer HealthCare Pharmaceuticals, Inc.; Bristol Myers Squibb; Cycle for Survival; Fred's Team; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Inspirna, Inc.; Lilly; Merck and Co., Inc.; National Cancer Institute; Transcenta Holding; and U.S. Department of Defense.Stock Shareholder in Inspirna, Inc.Faculty/PlannerAntonio Passaro, MD, PhD, has a financial interest/relationship or affiliation in the form of:Consultant and/or Advisor for AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; GSK; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Sharp and Dohme; Mundipharma International; Novartis AG; Pfizer; and Takeda Pharmaceutical Company Limited.Grant/Research Support from ArriVent Biopharma; AstraZeneca; Boehringer Ingelheim International GmbH; Bristol Myers Squibb; Daiichi Sankyo, Inc.; Genentech, Inc./F. Hoffmann-La Roche Ltd.; Janssen Global Services, LLC.; Lilly; Merck Serono; Merck Sharp and Dohme; Mirati Therapeutics, Inc.; Pfizer; and RMC Pharmaceutical Solutions Inc.Planning Committee and Reviewer DisclosuresPlanners, independent reviewers, and staff of PVI, PeerView Institute for Medical Education, do not have any relevant financial relationships related to this CE activity unless listed below.

Dr. Elizabeth Garner, MD, MPH, ( https://ferringusa.com/?team=elizabeth-garner-md-mph ) is Chief Scientific Officer, U.S., Ferring Pharmaceuticals, a research-driven, specialty biopharmaceutical group committed to helping people around the world build families and live better lives. Ferring is a leader in reproductive medicine and maternal health, as well as in specialty areas within gastroenterology and urology, including microbiome therapeutics and orthopedics, and has been developing treatments for mothers and babies for over 50 years. Dr. Garner has broad responsibilities for U.S. Clinical Development, Medical Affairs, Pharmacovigilance, Project Planning and Regulatory Affairs. Dr. Garner has nearly 30 years of experience in medicine and industry. Prior to joining Ferring in 2022, she held chief medical officer roles for ObsEva, a biotechnology company focused on women's health, and Agile Therapeutics, a women's healthcare company in the contraceptive space. Earlier, she held leadership roles in medical affairs at Myriad Genetics Laboratories and clinical development at Abbott Laboratories and Merck Research Laboratories. Dr. Garner holds a medical degree from Harvard Medical School and has practiced in obstetrics, gynecology, gynecologic oncology, and internal medicine at Brigham and Women's Hospital and Massachusetts General Hospital. In addition, she holds a master's degree in public health from Harvard's T.H. Chan School of Public Health and a bachelor's degree in music from Mount Holyoke College in Massachusetts. Dr. Garner is a member of the Boards of Directors (BOD) of Kezar Life Sciences (KZR), a publicly traded company developing novel therapies for autoimmune diseases and cancer, Sermonix Pharmaceuticals, which is developing targeted therapies for breast cancer, and is also on the board of Medicines360, a non-profit pharma company. She also serves on the BOD, and is President of, the American Medical Women's Association ( https://www.amwa-doc.org/about-amwa/leadership/ ), whose mission is to advance women in medicine, advocate for equity, and ensure excellence in health care. Support the show

Drs. Hope Rugo and Nancy Davidson discuss the next generation of endocrine therapy in hormone receptor-positive breast cancer – SERDs, SERMs, CERANs, and PROTACs – and challenges relating to the optimal sequence of therapeutic options. TRANSCRIPT Dr. Hope Rugo: Hello, I'm Dr. Hope Rugo, your guest host of the ASCO Daily News Podcast today. I'm a professor of medicine and director of breast oncology and clinical trials education at the University of California San Francisco's Comprehensive Cancer Center. Hormone receptor-positive (HR+) breast cancer is the most common subset of this disease and breast cancer is the most common cancer diagnosed in women worldwide. Endocrine therapy (ET) is the cornerstone of management in hormone receptor-positive breast cancer and may involve suppressing estrogen production with aromatase inhibitors in the cancer cell itself, or directly blocking the estrogen receptor pathway through selective estrogen receptor modulators, such as tamoxifen, or the injectable selective estrogen receptor degrader, fulvestrant. However, despite the availability of these therapies, the largest unmet need lies in treatment of HR-positive HER-negative disease lies after progression on endocrine therapy. On today's episode, we'll be discussing the emerging generation of endocrine therapies in breast cancer, some of which were designed to overcome common mechanisms of endocrine resistance, and the challenges relating to the optimal sequence of therapeutic options. Today, I'm delighted to welcome the world-renowned breast cancer researcher, Dr. Nancy Davidson, to the podcast. She's a professor and the executive vice president for clinical affairs at the Fred Hutchinson Cancer Center and professor of medicine at the University of Washington as well as past president of ASCO and AACR. You'll find our full disclosures in the transcript of this episode and disclosures of all guests on the podcast can be found in our transcripts at asco.org/DNpod. Nancy, it's great to have you on the podcast today. Thanks so much for being here. Dr. Nancy Davidson: Thank you so much, Hope, for the opportunity. Dr. Hope Rugo:  You've done incredible work in the area of treating HR+ disease, but also in understanding some of the agents and pathways that are most important to our understanding of how we treat and really think about developing new drugs for HR+ breast cancer. The first generation of anti-estrogen drugs really included selective estrogen receptor modulators, but now we have a new generation of these anti-estrogen drugs. And there's also orally administered selective estrogen receptor degraders, so-called SERDs, that we hope someday will be an alternative with already one approved for the injectable SERD, fulvestrant. But there's a whole additional class of drugs, complete estrogen receptor antagonists, referred to as CERANs, and proteolysis targeting chimerics, PROTACs. These agents are all at various stages of development in both early and metastatic settings and really represent, I think, a confusing array of different treatments that are being studied, some of which of course are approved. Nancy, it would be great if you could tell us some about these exciting new agents, starting with our approved drugs and moving on to the agents that we're studying in clinical trials. Dr. Nancy Davidson: Hope, this is a terrific example of how basic science has really begun to inform clinical practice. For us as breast cancer practitioners, it was really easy for a long time because we only had tamoxifen. And then things like the aromatase inhibitors as a means of decreasing the estrogen ligand came into practice, as did fulvestrant, as you mentioned, a selective estrogen receptor degrader. Thanks though to a lot of understanding about estrogen receptor biology, and specifically, the discovery about a decade ago of estrogen receptor mutations, something that we didn't think exist ed for a long time, but which we now know exists in maybe a third to a half of breast cancers after exposure to aromatase inhibitors, that's led to really an explosion, this alphabet soup of possibilities that you talked about. SERMs, selective estrogen receptor modulators, tamoxifen is the classic one—something that acts as an agonist and as an antagonist, depending on the tissue. The SERDs, the selective estrogen receptor degraders, lead to estrogen receptor destruction. Fulvestrant is the classic example of this right now. But we're very excited that a second one has been FDA approved. That's elacestrant that was approved earlier this year, and it has specifically been developed to try to target those estrogen receptor mutant breast cancers because those are the ones that are particularly resistant. So that's the first of this new generation of SERDs that's coming on the market, has come on the market. As you say, a key advantage there is that it's oral, unlike  fulvestrant, which requires 2 monthly injections and is very, very inconvenient and uncomfortable for patients. Other SERDs are coming along. I think another one that is well along in clinical development is giredestrant, which is in the same family and being tested in clinical trials of the classic varieties. It's been tested in a window trial, looking at its ability to down-regulate Ki67. It's being tested against standard of care in first-line metastatic breast cancer. And there are some studies that are going to begin looking at it in the adjuvant setting as well. There are other members of this particular family, but I think that elacestrant is the one that we have at our fingertips right now, and giredestrant is one that's certainly coming along in clinical trials, and we should look forward to those results. For those who are interested in the giredestrant, the trials in question right now that are going on are persevERA, which is in stage 4 breast cancer, and lidERA, which is in the adjuvant setting. Now that's one new category, or it's an old category with a new twist. A second is these agents that are called complete estrogen receptor antagonists, CERANs, as you talked about them. The key here is that what they do is, the estrogen receptor has a couple of domains, and in particular, it has 2 different activation domains, AFT1 and AFT2. And these CERANs are complete estrogen receptor antagonists, so they block both of those domains. And the hope would be that they might end up being more effective than the other agents that we have available to us right now. So those are also in clinical trial at the present time, and we're waiting to see whether or not there's going be any value in that particular area that's going to able to go forward for us.   Another area that I think we want to talk about is the PROTACs, as you mentioned. These are proteolysis targeting chimeric entities. So, this is a kind of a complicated situation where you have a kind of bivalent situation where you have something that binds both to the estrogen receptor and then also to E3 ubiquinase. So, it leads to degradation again of the agents; that's another area for us to be watching. And then finally the SERCAs. So those are the selective estrogen receptor covalent antagonists, and what they do is they bind very specifically to a cysteine 530 that exists in the estrogen receptor but not in other steroid receptors. So that's where the selective part of this comes along. Now these are all in various stages of clinical investigation. Some of them are pretty early at this point, but I think the ones that are well established are elacestrant, giredestrant is coming along as we just talked about. Camizestrant is also coming along through the SERENA series of trials, and imlunestrant is also coming on through the EMBER series of trials. Hope, I would also be remiss if I didn't go back to an old drug that's a new drug, and that's lasofoxifene, which is also in the SERM family. Those who have been in our field for a while will remember that lasofoxifene was actually originally kind of tested in the prevention setting, where it seemed to have some activity. It came back into our interest because it has really strong activity against estrogen receptor mutant breast cancer models in the laboratory. And as a consequence of that, it's coming back into the clinic through a series of trials that are called the ELAINE trials, where we're looking to see whether or not it might also be better than fulvestrant. It too is an oral agent, so that's a real plus for us, and the first set of ELAINE trials would suggest that there's some nice activity without a lot of toxicity. So, lots going on in this field. You know, I think for all of these things, obviously, we're also working very hard to think about the toxicities. All of these, as I recall, are oral agents. So that gets rid of  1 huge toxicity, which is you don't have the need for some sort of injection. But they all do have some side effects. Frequently, [the toxicities] are like GI side effects or fatigue. In a couple of cases, there might be some concern about cardiac arrhythmias, but I think GI turns out to be one of the most important things that we have seen in some of these trials. Generally, it's very well tolerated, though. I think another important question, which I'm sure is in your head and is in mine, is that how are we going to integrate these into what we already have? And so, I think a lot of the work right now is looking at patients who have already received an aromatase inhibitor plus a CDK4/6 inhibitor and are now going on to one of these new agents. But you might wonder, if they turn out to be effective and well-tolerated, whether they too should be perhaps combined with CDK4/6 inhibitors in place of the aromatase inhibitors or the fulvestrant that we use now. So, I think that we can imagine that those clinical trials are either in progress in some cases or will be coming on as we try to think about how to integrate these new approaches into our existing standard of care, which is already quite complicated, right? We've gone far from tamoxifen, which was good for everybody, to now a really complex algorithm about how we think about hormone therapy, both in early breast cancer and in metastatic breast cancer.  Dr. Hope Rugo: Well, that was a fabulous discussion about the new agents and our existing agents and both the exciting aspects, as well as the challenges. One question that comes up, I think a lot, and this is of course a huge question in many ways, but for ER-positive metastatic breast cancer, where these drugs are first being tested, maybe we'll talk about that first. There's one trial at SERENA-6, looking at camizestrant in patients who have developed evidence of an ESR1 mutation in circulating tumor DNA, who are on first-line therapy with an AI and a CDK4/6 inhibitor. What do you think about that study and where do you think that progress might go? Of course, that's based on data from another trial, which wasn't definitive, but suggested, had sort of a suggestion, you know, without studying the sequencing in detail that maybe you would have improved progression-free survival with that approach. Dr. Nancy Davidson: Yeah, by which you mean the idea of monitoring pre-ESR1 mutations and circulating DNA and then making therapy changes based on that? Is that what you're talking about? Dr. Hope Rugo:  The PADA-1 trial, yes, and that led to this huge SERENA-6 trial, which of course is now accruing. Dr. Nancy Davidson: So, you know, we would love that, right? I think that obviously breast cancer for many years has been interested in trying to have circulating markers that we could use to help to guide our therapy in a more meaningful way than we have in the past. And I think that the trial that you've talked about is certainly one that's trying to make that see whether that's a possibility for us based on information like the PADA trial. I'm hopeful it's going to work out. I would say, let's see what that looks like, whether it's going to be useful or not. It seems to me in some cases, some of these trials have not been quite what we hoped for, but I don't think we necessarily had the molecular techniques or the sensitivity, nor did we necessarily have other things to move to because, you know, those two approaches require both a really good test, but also the ability to use the test to define a new therapy that's going to lead to improved patient outcomes. And I think that these are ingredients that we now have available to us at our fingertips more than we did, say, a decade or 2 decades ago. Exciting approach. Dr. Hope Rugo:  I do think there's a lot of challenges inherent in this process, monitoring blood on a regular basis and following up and then randomizing based on results. But I think [SERENA-6] is an incredibly important trial, as you have mentioned, to try and think about moving past using circulating tumor cells, which didn't work, to just change blindly to the next therapy, but more have a rational reason to change to a drug that may be more effective before the disease itself progresses. And just for our listeners, the unique aspect of trials like this in SERENA-6 is that you change therapy before you have evidence of disease progression, but only this molecular evidence of a mutation that is associated with resistance to the therapy you're on. So, it's a really important question. We'll see what happens, as you mentioned, sometimes we're not clever enough to really get around the fact that there are multiple mutations driving resistance in this setting, so we'll see how straightforward this is. The question also comes up, and I think that's a question with many of these trials now, is they're randomizing patients after a progression on an AI and CDK4/6 inhibitor to receive the novel endocrine therapy or fulvestrant. One of, I think, the concerns of treating oncologists is that then you're sort of eliminating the possibility of a targeted agent in that setting. And of course, we have new targeted agents we're studying as well, AKT inhibitors and new inhibitors of the PI3 kinase pathway. So, the newer trials are now combining, as you mentioned. There's a lot of concerns about drug-drug interactions here and how you might really combine them. And then there are triplet studies looking at CDK4/6 inhibitors, oral SERDs primarily, and pi3-kinase and CDK4/6 inhibitors. What's your thought on these and will they really help to move the needle forward? Dr. Nancy Davidson: I think that's a really interesting question, Hope, is whether or not we're going to find that combination therapies from the get-go are the way to go, or whether we're going to end up having to use maybe more serial therapies. Because not only is it a question about whether or not you can tackle all of these different resistance mechanisms simultaneously, but I think the other question is, as you say, are there negative drug-drug interactions, and are there toxicities that are intolerable? Although these are targeted in all cases and they're relatively benign in terms of side effects from the breast cancer perspective, they're not devoid of toxicity. And so, I think that's going to be another issue for us – whether they're well tolerated during the time that patients are taking them. I guess the other thing I always think about, Hope,  is that it's hard to know about value of cancer care, but you know, we are talking about agents that are not inexpensive. You know, when you think about the financial toxicity, in addition to the side effect toxicity that you and I just talked about, trying to think about what that value is going to look like is going to be very important for us. Also, as somebody who worked for a long time in the lab and in the clinic, you know, there are an infinite number of combinations that you and I could think about that are rational. And so, the question is, how are we going to pick the ones that are the most rational, if you will, the ones that seem to be the most promising, and take them forward into clinical trials? Because patients are our most precious resource. And so, we want to make sure that we are bringing forward only those things that really seem to have a very strong foundation and the opportunity to improve outcomes over time. Tough, tough question for us to try to think about, as you've talked about. The other thing is that, you know, these trials are not only for postmenopausal women, who are the majority of patients, but we also want to target them to premenopausal women. So, in those women, we're also looking at using an LHRH agonist on top of this, right, because many of these things are really at least so far designed for the postmenopausal state. So stay tuned. Lots of work going on. I think one of the interesting things will be making the leap from using these in metastatic disease at time of progression to taking them forward into the early breast cancer space. And several of the agents are now beginning to do that because of very strong preclinical and clinical data to date. Dr. Hope Rugo: So, we have new agents that we're studying in the metastatic setting, and we've seen a trend to move fairly rapidly from phase 1B trials directly into phase 3 trials, because as you pointed out so clearly, there are a number of drugs in this setting, and we don't really know not only which agent is better, but even what class of agents is better. So, as we move more quickly from phase 1B to phase 3, the question comes up about how we're going to study these agents optimally in the early-stage setting. They, I think we all thought that maybe changing based on ctDNA evidence of a mutation might be an approach, but that's complicated. A big question for you is whether or not you think that's ready for prime time as it's being marketed as such. And then the second question is really, are we better changing our whole approach upfront in high-risk disease or should we wait until after patients are exposed to their endocrine therapy and then switch as we go along; the EMBER-4 trial is looking at that switching approach? Dr. Nancy Davidson: Yeah, I think that this is obviously the billion-dollar question for many companies and for many of us as investigators. I don't know that I have a crystal ball into what the best approach might be. We know that already some of these have been abandoned. For example, amcenestrant. So, I don't even have to learn how to say it because it has been abandoned. It did go to phase 3, as you pointed out, in the advanced setting, looking at it with palbo vs letrozole plus palbo, and it didn't really show a whole lot that the company wanted to pursue.  So, I think that sometimes these things are going to be abandoned based on the metastatic setting, which is a large trial, and that's a trial where obviously it might be a little easier to the circulating markers, as you talked about, than maybe in the early-stage breast cancer setting.  I think that probably these early-stage trials are going to end up being big; they're going to have be clean. I'm guessing that most companies and most investigators will want to target them towards high-risk individuals, as you talked about, for 2 reasons. One is that ethically, I think we feel more comfortable with that. These are individuals where standard therapies are maybe not serving them as well as we would like and where we have information to think that we can at least have equipoise about a new approach. And the second is that from a trial design point of view, the event rate is likely to be higher, and therefore you might get answers earlier and with a smaller clinical trial. So that's where I suspect we're going to go. But it's a challenging question, and I think that many investigators and many companies are really trying to struggle with that right now because we do have so many options. And we're not quite sure how to, first, develop these new drugs, but then really importantly, put them in the context of our existing drugs. And as you say, we're also simultaneously trying to develop superior molecular or circulating markers to guide us. So, there's so many variables that are going on right now in this field that, from my point of view, itmakes it really exciting, but it also makes it pretty complicated, both for investigators and for pharma as we try to think about how to position these going forward. But what a great problem to have, Hope, because remember when you and I started in breast cancer, pretty much all you needed to know was tamoxifen. And I think you and I also probably started at the tail end of the time when we were using androgens and progestins and agents that now have basically completely fallen out of favor. Dr. Hope Rugo: Estrogen Dr. Nancy Davidson: Estrogen, yeah, and your side effect profiles were not as good. So, it's a good problem to have. It's a nice situation when science can inform our clinical investigation, our clinical practice. Dr. Hope Rugo: Yes, I think it'll be fascinating to see where we end up at the end, but of course, the complexities of this include the fact that sometimes just the clinical trial design leads to a less than positive result because of the way the trial itself has been designed, which I think is the nice part about moving these earlier into treatment of high-risk disease, but also brings up the question of all sorts of areas we're not really a place to discuss today, like how the statistical design is made, et cetera, that can sometimes result in poor evaluation of excellent agents. One of the questions that comes up, and you brought this up earlier, which I think is really important, is that we are in the era of combining our endocrine agents with targeted agents, and, oral agents, in a fascinating way, really bring up drug-drug interactions in a way that the injectable fulvestrant hasn't, and aromatase inhibitors were kind of quiet on the impacting metabolism, unlike tamoxifen. But we are seeing some drug-drug interactions and certainly the discussions about using these agents may include the question about whether or not you're having more diarrhea or nausea or fatigue or one drug causes photopsia, flashing lights, things like that. Keratitis is becoming a new toxicity to follow.  How are we going to figure out how to sequence these drugs and are they only going to work better all of them as a class in patients with ESR1 mutations in their tumors? Dr. Nancy Davidson: I think we don't know the answer to the second question yet. That's something that really needs to be sorted out. Even if they do, that's still a really important subset of patients, assuming that we continue to start with the aromatase inhibitors, right? That's where those things really seem to emerge right now. I don't know how we're going to figure those things out. I guess that I'm hoping that maybe a couple of agents in these classes will become kind of the lead agents. And so, we'll be able to do this work with a handful of things as opposed to a whole array of things. But we'll see. I think that even within classes, obviously, these agents are going be slightly different, probably. And so it may be that one member of a class may be slightly better from a, maybe not from an efficacy point of view, but from a toxicity point of view. And we'll just have to see how it goes. I don't think I have any magic answers about that. Dr. Hope Rugo: Yes, it'll be interesting to see whether or not the agents work in sequence too. You know, could you use a PROTAC after an oral SERD, for example, or a CERAN? That'll be fascinating to see. Dr. Nancy Davidson:  I'm hoping that preclinical modeling may help with that a little bit, though of course we all know that there are plenty of things that do well in preclinical models, GEMS and rodent models and PDXs, and sometimes those things translate nicely into clinical practice, but sometimes they don't. Dr. Hope Rugo: You mentioned, Nancy, that when we started out, that it was a fairly simple decision about what endocrine therapies, and we ran out very quickly. We're seeing some of those old classes come up with new agents. And you mentioned lasofoxifene, the oral SERM that seems to have some benefits and works in the later-line setting and also can be combined with a CDK4/6 inhibitor; [and also] has data with abemaciclib. There's also a new androgen receptor agonist, enobosarm, that's being tested as well. Do you think that these older mechanisms have a future as well? Dr. Nancy Davidson: I do. I think that because we'll be able to understand the biology better than we did in the past. A lot of our hormone therapy was pretty empiric several decades ago. But I think with better understanding of mechanisms and better understanding of what the patterns of resistance might be for a particular tumor, that we might be able to think about those things. You're right that there's a whole parallel universe right now in androgen receptor targeted therapies that we're not talking about today, both in perhaps in hormone-responsive breast cancers, but also in triple-negative breast cancers in a certain subset. And so that's an area where we probably need to be watching what our prostate cancer colleagues are doing as they develop these agents and thinking about where they might mechanistically make sense to apply in the breast cancer field. It won't be the first time that we've received insights from them because remember, prostate cancer people knew about androgen receptor mutations a really long time before we figured out that they existed in estrogen receptor as well. So, there's a nice cross talk, I think, between the prostate cancer field and the breast cancer field in that regard. Dr. Hope Rugo:  That's an excellent point. And we learn a lot from our colleagues studying other malignancies, and prostate cancer has been a big area there for us and hopefully will help us with studying these agents because there's different toxicity profiles, of course, as well. And then you mentioned the approval of elacestrant, the first oral SERD to have regulatory approval, and it's approved in patients who have ESR1 mutations in their tumors. We're also studying it in the ELEVATE trial in combination with all of the different targeted agents, the CDK4/6 inhibitors, mTOR inhibitor, everolimus, and the PI3 kinase inhibitor, alpelisib, to really try and understand how these can be optimally combined. Would you check for ESR1 mutations at diagnosis of metastatic disease, or would you do this more after progression or start of progression of disease on an aromatase inhibitor? Dr. Nancy Davidson: I tend to be a conservative, Hope, and so unless there's a clinical trial that might be able to be considered, I would tend to check it only after progression on the aromatase inhibitor. But I think some people are earlier adopters, and I suppose it's possible that they might want to know from the get-go. Having said that, I do think elacestrant has an approval after aromatase inhibitor, as I recall. So, presumably the patient would have to have that exposure before you would be able to act on the ESR1 mutation by administering the oral SERD. This is also a new area that may well change with time, right? You know, as we develop different agents, as the agents have different requirements or different indications, and as we perhaps have better tests, it may be things that we don't do routinely now will become very routine in the future. And perhaps in series like you talked about in a serial fashion. Dr. Hope Rugo: Absolutely. I think that's a really important comment about how we're going to think about treating hormone receptor positive disease and potentially, you know, we have new chemo options, of course, not part of our talk discussion today and antibody drug conjugates. So, the future is certainly challenging in terms of understanding this appropriate sequencing. We need data, but it's exciting to have these options. As you pointed out, this is this is a great problem to have, you know, too many drugs with efficacy to try and understand how to use these in the most appropriate way. And as you also pointed out, the use in young women is particularly important. Whether or not you need to suppress the ovaries with all of these new agents is going to be important to understand as well as a next step. I don't know if you have specific thoughts on that area as well. I mean, that may reduce toxicity for younger women. Dr. Nancy Davidson: I guess our approach right now has been to suppress them, but I agree with you; you wonder if you look at some of the mechanisms of action, whether that's really a requirement biologically and medically, or whether it's something that's kind of a leftover from the approval process. You know, that for the drug approval, these women were suppressed. I think we need to work that out because that's another area where certainly women could have ovaries removed. That's pretty straightforward, although it requires a surgical procedure. But otherwise use of LHRH agonists continues to be injections, right? And so, if we're trying to minimize convenience or maximize convenience and minimize toxicity for women with any stage of breast cancer, anything we can do, it seems to me to eliminate an injection is going to be a good thing. So important for us to be able to work that out as well, even though numerically it's a smaller number of women, it's obviously a very important number. population of women. Dr. Hope Rugo: Last question for you. One question that comes up and sent to me and panels all the time is, if you have done your next generation sequencing and you see an ESR1 mutation and a P13CA mutation, what do you prioritize in terms of your choice of treatment, because we have the choice of either using elacestrant or a fulvestrant in combination with an agent targeting the PI3 kinase pathway? Dr. Nancy Davidson: I don't know that there's a right answer to that medically right now. So, when I talk about it with patients, I suggest to them that it's probably not one or the other. It's kind of the question of which one to use first. So, we talk a little bit about side effect profiles. We talk a little bit about patient preference and neither of these drugs is devoid of problems, but sometimes patients have pretty strong feelings about which set of side effects seems the least unattractive to them or the possibility of having those side effects. And I know that if one isn't well tolerated, you can swap over to the other. Dr. Hope Rugo: Absolutely. I think that's a very important way to think about next therapies in our era of not really knowing what's right. And this idea of shared decision-making is so incredibly important. Nancy, thank you so much for sharing your insights and knowledge with us today. I could talk to you for hours about this. Dr. Nancy Davidson: Hope, thank you so much for the opportunity. It is an exciting area and I really enjoyed talking with you about what we know and the many things that we don't yet know, but we're working on. Dr. Hope Rugo: Indeed, it's certainly an exciting time. Thank you to our listeners for joining us today. And thanks to the ASCO Daily News Podcast for highlighting this important area. You'll find a link to all of the studies discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Thanks so much.   Disclaimer:    The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.    Follow today's speakers:     Dr. Hope Rugo  @hoperugo  Dr. Nancy Davidson     Follow ASCO on social media:     @ASCO on Twitter    ASCO on Facebook    ASCO on LinkedIn      Disclosures:     Dr. Hope Rugo:  Consulting or Advisory Role: Napo Pharmaceuticals, Puma Biotechnology, Mylan, Eisai, Daiichi Sankyo Research Funding (Inst.): OBI Pharma, Pfizer, Novartis, Lilly, Genentech, Merck, Daiichi Sankyo, Sermonix Pharmaceuticals, AstraZeneca, Gilead Sciences, Astellas Pharma, Talho Oncology, Veru, GlaxoSmithKline, Hoffmann-LaRoche AG/Genentech, Inc Travel, Accommodations, Expenses: Merck, AstraZeneca   Dr. Nancy Davidson: No Relationships to Disclose    

Drs. Hope Rugo and Kristin Rojas discuss advances in the management of menopausal symptoms, fertility preservation, and bone health for women on endocrine therapy for breast cancer. TRANSCRIPT Dr. Hope Rugo: Hello. I'm Dr. Hope Rugo, your guest host of the ASCO Daily News Podcast today. I'm a professor of medicine and director of breast oncology and clinical trials education at the University of California San Francisco's Comprehensive Cancer Center. And I'm also an associate editor of the ASCO Educational Book.   In patients with hormone receptor positive breast cancer, the most common subset of the most common cancer in women worldwide, adjuvant endocrine therapy significantly reduces the risk of recurrence and death. However, prolonged estrogen suppression associated with the use of endocrine therapy can cause life-altering menopausal symptoms, bone loss, and fertility concerns. These issues impact the use of endocrine therapy and potentially breast cancer outcome.    Today, we'll be discussing mitigation strategies to manage the side effects of endocrine therapy, which we hope will improve our patient's quality of life and adherence to treatment with Dr. Kristin Rojas, who addressed these issues in a recently published article in the 2023 ASCO Educational Book. Dr. Rojas is an assistant professor of surgery and a breast surgical oncologist and gynecologic surgeon at the University of Miami Sylvester Comprehensive Cancer Center.    Our full disclosures are available in the transcript of this episode, and disclosures of all guests on the podcast can be found in our transcripts at asco.org/DNpod.    Dr. Rojas, thank you for being on the podcast today.   Dr. Kristin Rojas: Thanks, Dr. Rugo, thank you so much for having me. Thank you to ASCO as well. It's truly an honor to be here with you today.  Dr. Hope Rugo: Your excellent article provides an updated overview of the existing approaches and a little forward thinking for improving the quality of life of breast cancer patients who are receiving estrogen deprivation therapy, a really broad term we use for all the hormone therapy we use in ovarian function suppression in the treatment of breast cancer. And then you had a very nice session education session at the ASCO Annual Meeting discussing these issues. Can you briefly discuss the educational session, your speakers and topics, and then we'll get more into the details of this important topic?   Dr. Kristin Rojas: At our educational session at ASCO this year, I chaired the session and presented on managing the sexual side effects and menopausal symptoms of estrogen suppression. And I had two wonderful colleagues with me: Dr. Matteo Lambertini, who shared guidelines regarding bone-targeted agents and managing bone health during endocrine suppression. And then we also had Dr. Terri Woodard, who is a reproductive endocrinologist from MD Anderson, who spoke on managing fertility concerns, which is a very important topic right now.   Dr. Hope Rugo: Yeah, that's great. And it was such a fabulous session. Our listeners can view it online at asco.org if you missed this session. But let's talk a little bit about what was in your article and what was discussed. First, I think the physical and psychological effects of cancer care we know are critical components of survivorship care. Can you tell me a little bit more about that and how we need to understand that as oncologists?  Dr. Kristin Rojas: So, as you know, as treatment continues to improve, our cancer outcomes are improving and the population of survivors continues to grow. So, I think that for many breast cancer patients, or having the diagnosis of breast cancer, becomes more of a chronic illness and less a life-threatening issue for some. I think that the conversation is now changing from “Will you live?” to “How will you live?” And I was thrilled to see that other big organizations, along with ASCO, are prioritizing managing these important symptoms in survivorship. Because I think that, as most patients will be on some form of estrogen suppression, managing the toxicity of these therapies, as you pointed out, probably does influence treatment adherence, which directly translates to an oncologic improvement. So, it's not just managing these soft symptoms, it actually will have a direct influence on probably overall survival along with disease-free survival.  Dr. Hope Rugo: Yeah, I think that's incredibly important and it's not just about doing the exam and finding out symptoms that might signify recurrence, it's really trying to address the effects of the treatment patients have gotten of chemo and their ongoing treatment with endocrine therapy that's so incredibly important. And now, of course, in medical oncology, we're adding on more agents which add to symptoms. That'll be the topic of next year's ASCO educational session. What do you do with the CDK4/6 inhibitors and managing those. But in more than 80% of women who are on the antiestrogen or various, I'm going to call hormone therapies, for early-stage breast cancer, vasomotor symptoms are a big issue. They're typically more severe in younger patients because of course they have estrogen and we take it away. So, how do we mitigate this problem in patients that can result in poor sleep and impact many aspects of one's psychosocial status? And these issues, not sleeping, of course, you make everything worse.  Dr. Kristin Rojas: Yeah, that's a really important point. And you're right, this is a really common symptom experienced by the majority of patients on endocrine suppression. And not only those patients, but patients with triple negative disease who are put into menopause from chemotherapy, etc., along with women with cancer of other disease sites. And so, as the director of our program at the Sylvester Comprehensive Cancer Center, the program is called MUSIC, which stands for Menopause Urogenital Sexual Health and Intimacy Clinic.    This is a very common symptom that patients often report. And one of the important things about this that I've realized is that hot flashes or vasomotor symptoms can actually have a pretty varied presentation. So, it's not just intense sweating. Sometimes these patients can present with palpitations, panic attacks, and they don't even realize that they're hot flashes. This is an effect of estrogen suppression and it's a central mechanism. So, it's probably related to hypothalamic dysregulation regarding how our body senses temperature changes, but it results in widespread flushing and sweating and those other aspects I told you about.   So, we've known for a long time that there are some behavioral modifications that can help with vasomotor symptoms or hot flashes. But now, we actually do have some pretty effective pharmacologic therapies for these patients as well, for whom behavioral modifications aren't completely helping the issue. Or, as you said, when patients are being woken up all night long with these hot flashes, it totally disrupts how their day goes and disrupts coping with their disease and all the other aspects of their treatment.   So, there's some effective treatments that we have. One of those being cognitive behavioral therapy has been shown to be helpful. The data on acupuncture is mixed, but I'm hopeful about this. And then the pharmacologic therapies we have. Traditionally or historically, clonidine, which is an alpha agonist, has been used along with gabapentin. But I think when choosing a medication to prescribe to a patient for hot flashes, you have to take into account the side effect profile. Clonidine does have some issues with blood pressure rebound, and gabapentin is really only effective in large doses, which can be very sedating for patients.    In the MUSIC Sexual Health After Cancer program, we typically stick to low dose SSRIs or SNRIs. I usually go with venlafaxine at a really low dose of 37.5 milligrams, and I can titrate up. I have patients take it at night in case they feel a little foggy when they first start it. But more recently, we've started using oxybutynin, which is an anticholinergic medication originally FDA approved for overactive bladder. I use the XL formulation, or you can do 2.5 or 5 milligrams BID. And this, in a study a few years ago, was shown to significantly reduce hot flashes and improve quality of life in a placebo-controlled trial.   So, important aspects of side effects of these medications with SSRIs or SNRIs working in the MUSIC Sexual Health After Cancer Program, sexual health concerns are often an issue, so those drugs can be libido zappers sometimes. But, the biggest side effect I've come across with oxybutynin for patients is dry mouth, and usually that resolves after a little while. So, we've had a lot of success in managing patients' hot flashes with these medications.  Dr. Hope Rugo: That's great and incredibly helpful. And I will say that as we're talking about these issues on this podcast, this is really important for all of our staff and our clinics because most of us don't have a fabulous clinic like the one you've started. But we are managing this with our staff, our APPs, and other areas that our patients are seeing. If everybody has this education, it will really help in the management of symptoms. And I just want to point out that venlafaxine was the first drug to be studied in this area really successful, but that we can use a whole host of different antidepressants. If people have side effects from one another, one may work really well, and generally low doses work well. The oxybutynin was such a very cool study. I think that's a great additional option.    In addition to hot flashes, we also see genitourinary syndrome of menopause, and that's part of what you deal with every day in your clinic, GSM. And this can be not just vaginal dryness, which is bad enough, but also increased infections, painful sex, recurrent bladder infections and also reduced libido, which is a really big issue, we just don't talk about very much. What's the most effective and safe treatment for GSM? And we use a lot of low dose vaginal estrogen and a variety of delivery mechanisms. What are the risk and benefits when patients really need something more?   Dr. Kristin Rojas: GSM, or genitourinary syndrome of menopause, is this newer umbrella term for what we used to call vaginal atrophy. And you're right, it encompasses not only dryness, but all the other changes that can happen to the vulvovaginal mucosa along with anatomic changes to the pelvic floor. This is critically important, I think, that we address these issues or these potential side effects at the time of endocrine therapy prescription because what we have found in our program is that while hot flashes might get better, these symptoms do not get better. And left untreated, they get worse.   And one of the surprising findings that we have presented earlier at another conference this year was that almost half of our patients, when they had their pelvic exam in the program, were also found to have vaginal stenosis. So narrowing and shortening of the vagina, making penetrative sex actually impossible. So it's really not just dryness, but a host of these other symptoms that go along with that. I like to break this down in a really simple way because I know that a lot of providers may be intimidated when patients might bring this up. But I think about it this way. Number 1, eliminate irritants. Number 2, moisturize. Number 3, lubricate. And 4, address the pelvic floor.   Oftentimes when patients present in the MUSIC program, they've been putting a lot of over the counter topical therapies on the vulva and the vagina using intravaginal washes. One of the biggest offenders of some of these symptoms is artificial fragrance, which we can actually develop an allergic reaction to, which manifests as burning and stinging. So these patients may also report burning and stinging in addition to dryness. These offenders can be in all kinds of products. So not only feminine washes, which I don't recommend in our program, but things like bath bombs, bubble bath, toilet paper. And so we kind of go through an inventory of everything that's touching the delicate tissues of the vulva and the vagina and try to back off those products.   The second thing is moisturization. It's important to talk to patients about the difference between moisturization, which I say is for maintenance, and lubricants, which are for PRN use sexual activity. But I tell patients, "lubricants for love." That's how I differentiate the use of these two different types of products because they have different properties. Usually after eliminating irritants, our first step is to start with a non-hormonal moisturizer because there's some really good high-tech non-hormonal moisturizers out there, specifically those containing hyaluronic acid, which pulls moisture from the environment and holds it on the skin. And by using this first—this is my personal opinion—but I think by improving the mucosa a little bit and kind of improving the dryness, maybe even the elasticity a little bit, I think that when patients do have persistent symptoms after using regularly these non-hormonal moisturizers at least three times a week, that adding in a low dose vaginal hormone at that time, instead of putting it on completely atrophic mucosa, you're putting it on kind of like a pretreated mucosa, which I think might decrease systemic absorption.   I'm so glad you brought up vaginal estrogen. I could give an entire talk just on that, so I'd be happy to do that next year for ASCO if anybody wants. But it is very controversial. Historically, there have not been studies showing an increased risk of recurrence with the use of local estrogen therapy, so estrogen in the vulva and the vagina. However, there was a recent study that came out this year that was a large analysis of breast cancer patients receiving different types of hormone therapy. And in a subset analysis of the group who got local vaginal estrogen, just in those patients on aromatase inhibitors, there was a slightly, but statistically significant–according to their analysis–increase in the risk of recurrence. I think there's some issues with this analysis because it was a large study and there's a lot of recall bias and measuring this in patients is really challenging. But I think it's still important to mention because a lot of patients are going to read about those things, these types of studies.   The way I approach it is to start with the lowest dose and I start with infrequent dosing. If patients have persistent symptoms, I start them with once a week or twice a week, which is different from the original pharmacokinetic studies of higher dose estrogens, which showed a bump in their serum estradiol when they used it every night for two weeks. So I actually do the opposite and taper them up. I'll do once a week to twice a week. And usually, patient symptoms are resolved at that point.   But I do want to point out, that's a great option for patients on tamoxifen because mechanistically, as you know, it probably doesn't matter if they have a little bump in their serum estrogen. But for the patients on aromatase inhibitors, we actually have a new kid on the block, a vaginal androgen called prasterone or DHEA. I dose this in the same way, titrate it up. But this can be really helpful for patients on aromatase inhibitors because the ALLIANCE trial showed that for those patients on AIs that their systemic estrogen levels do not increase. And so that's kind of how I manage that discussion. I do think it takes some multidisciplinary collaboration, so I always involve my medical oncology colleagues on this.    Lastly, lubricants. So, everyone seems to be really into using water-based lubricants, but I try to tell patients, unless you're depending on condoms for STD or contraception protection, silicone-based lubricants that are like preservative-free and don't have a lot of those gimmicks or additives, are great—they stay slippery for longer—and there's some really great brands out there. And then for patients who still have persistent pain with sex, we address the pelvic floor, which is either through the use of dilators, referring them to pelvic floor physical therapy, or other sexual devices that we use in the MUSIC program.  Dr. Hope Rugo: This is really helpful, and I think that for many of us in practice, we really want to get the specifics of what you use. I think this prasterone, the idea of DHEA is really very interesting and something that personally I haven't used, but we did use in the distant past before there was an FDA-approved version.   So I guess I have several questions just to ask about the details. So one is, when you prescribe this, do you find it's generally covered by insurance? And when you say low dose, do you mean just try it once a week? And then do you use the estrogen tablets, the brand names are often Yuvafem or Vagifem, we often use those twice a week. How often do you use them and do you use the estrogen ring also? What are the absolute specifics of what you're recommending to these women? And do you feel like sometimes in patients who are developing these symptoms that early use can help avoid the more severe symptoms and therefore reduce the exposure?   And lastly, just to say, that paper which was so interesting about the slightly increased risk of recurrence, I felt was so flawed in terms of what people were using and if they were taking their hormone therapy and risk of recurrence, the risk of the cancer itself, that I really felt like I couldn't make anything out of it in terms of the risk to patients. But I'm really interested in your specific recommendations.  Dr. Kristin Rojas: Thanks for asking about specifics. And I'm happy to give our treatment algorithms here, which we also discussed in our session and we listed in our EdBook manuscript. We do pelvic exams in the MUSIC program and I often find that there's very specific points in the vestibule or the opening of the vagina that are tender and have pain, specifically, what's known as the posterior fourchette, which is the kind of connection between the right and the left side towards the posterior aspect. So, I usually start with a 1% estradiol cream and have patients tap it to the outside and then bring in a dilator and have patients use not only a silicone lubricant, but put some of the estradiol cream on the dilator. And so that brings the product up to the top of the vagina for patients that have some of those anatomic changes that I discussed.   So this is 1 option, and we really don't have a lot of issues with insurance authorization for the cream, just every once in a while. We can also use a 4 microgram or a 10 microgram dose of estradiol, which is a tablet, which are newer options. This is in contrast to the old pharmacokinetic studies that use 25 micrograms. So this is much, much lower. I do run into some prior authorization issues with those because there tend to be newer versions of this. But as you mentioned, the estradiol ring, which I do think is a great option and when you calculate it out, releases a very low dose of estradiol every day. And it's good for patients who want a more low maintenance regimen. The only challenge I've had with that is it's a large rigid ring. And for patients who already have those anatomic changes, it can be really hard to place that in the vagina.   And so, just like you said, early prevention and treatment of these issues can prevent not only anatomic changes, but even potentially the need for exposure for larger doses of hormones. For all of those options, I tend to do it once or twice a week and then can move up. But we sometimes get kind of creative in how we use these options in terms of placing them on the dilator, placing them externally. For patients that have recurrent urinary tract infections, I also have them kind of tap some of the estradiol cream around the urethra as well to improve the urethral and potentially bladder microbiome and decrease risk of recurrent UTIs.  Dr. Hope Rugo: That's really interesting, and I think those specifics are incredibly helpful. We also will check, although I have to say there's no data to support it, the serum estradiol levels in patients who are using more than our minimal amount. We have plenty of studies that have shown that there really isn't systemic estrogen if people are using very low doses. But we will check sometimes, just sometimes people use these topical creams where they get premenopausal levels of estrogen, which of course we don't want. So, this is an incredibly helpful and useful discussion.    One of the other things that happens for these patients and our younger patients, which breast cancer is still increasing in small numbers in younger patients every year, and many of these patients have hormone receptor positive disease. And it just breaks your heart to see a 38-year-old who is planning to get pregnant next month with their new partner who develops a hormone receptor positive breast cancer. and we want to give people all the options they possibly can. We are strong proponents for harvesting eggs and either freezing eggs or embryos before you start treatment. And we figure we always have 2 weeks for breast cancer. We also use ovarian function suppression during chemo just for whatever help it might have.   But then after patients have finished their treatment and they're on hormone therapy, it's a really big issue for women about when they can have a child because we don't want to wait until they're 45. So, you had noted in your article that some women could take a break from endocrine therapy after 18 to 24 months to try and conceive. Can you tell me a little more about that?  Dr. Kristin Rojas: Sure. Well, this aspect of our discussion was very well presented by my colleague, Dr. Terri Woodard from MD Anderson, a reproductive endocrinologist, and she also put together the aspect of this for our manuscript. She talks about how fertility counseling and referral is probably underutilized, but definitely indicated for most of these patients who are of pregnancy age or premenopausal status. And observational data for a long time didn't show that pregnancy after treatment worsened oncologic outcomes. However, patients as well as many providers had reservations.   So, it's been very helpful that we now have a prospective, large, international trial known as the POSITIVE trial, the early results of which came out earlier this year, which showed that women, after 18 to 24 months, could interrupt endocrine therapy and did not have a worsened short-term oncologic outcome. And those are women with early-stage breast cancer. However, there is a concern that many patients do take longer to get pregnant in that age group or after treatment, potentially if they've received chemo. There is a concern about the duration of time that they're not on endocrine therapy afterwards, which might be further clarified in later analyses. So that's my takeaway from that study, which did show us that very helpful, reassuring information. But I think we're still waiting for the long-term data and it's definitely still a very important patient-centered discussion.   Dr. Hope Rugo: This is a really excellent point, and I think that one of the things of a trial like this, which is sort of a registry study, is that we're always going to speak with our feet to some degree. So, if patients have very, very high risk of recurrence and highly proliferative disease, we might not want them to stop at 18 months because their risks are so high early. So, it has to be a risk versus benefit discussion for individual patients, of course. But I think this data was incredibly reassuring.   It was interesting there were some patients who hadn't restarted their endocrine therapy. In the paper in the New England Journal, it told us that some of those patients were still trying to conceive. But one of the things that's going to be really important for these patients is to really make a big effort on the part of our clinical practices to get patients to restart their hormone therapy. It's very hard to do that, as you can imagine, in that setting.    Another area here is monitoring bone health. And I know that's not part of the MUSIC clinic per se because you're really focusing on GSM and other areas that we've just discussed, which are so incredibly important. And it's funny, bone health is silent, right? So, although some patients don't want to take aromatase inhibitors because they're worried about losing further bone density, they don't feel it. So that's, of course, a different kind of a toxicity. But we know that by suppressing ovarian function in young women, we cause a lot of bone loss, and in older women, already in menopause, that this continuous loss of bone increases the risk of fractures, which can be a huge impact on quality of life and even survival in some cases. So, we're really interested in trying to prevent bone demineralization and reducing the risk of fractures. I believe that Matteo Lambertini from Italy discussed this in your paper and that there's a lot of discussion about use of denosumab and zoledronate. I wonder if you could just comment a little bit on that in our last couple of minutes.  Dr. Kristin Rojas: Well, as you said, my colleague Dr. Lambertini put this aspect of our paper together, but he did put together a very nice summary of bisphosphonates and denosumab and separated their use by premenopausal and postmenopausal patients because the data surrounding those patient populations is slightly different or nuanced. But as you mentioned, it is important to monitor these patients' bone density. We have our standard recommendations such as a calcium-enriched diet, resistance and weight-bearing exercise, and vitamin D for patients, for those patients with a vitamin D deficiency or at risk of bone density loss. And so these pharmacologic agents can also help decrease bone mineral density loss and potentially decrease or likely decrease bone recurrences, which, as we know, influences survival. I think he provides a very nice summary of that, as you mentioned.  Dr. Hope Rugo: I think that's so incredibly important. And thank you for really emphasizing the weight-bearing exercise and checking vitamin D and making sure patients are taking vitamin D and at least some calcium. And then, of course, our institution, we work closely with our endocrinologists specializing in bone as well, when issues come up about risk of osteonecrosis of the jaw, and we require dental clearance for everybody starting medication just to make sure that we've reduced risk to the patient. And then when we're trying to think about stopping denosumab and should we bridge with zoledronate to reduce the risk of fracture, we also talk to our bone doc. So it's really important.   And in our last just 1 minute, I know you were thinking of saying something about measuring estrogen in the blood in patients who are using vaginal estrogens. Do you do that?   Dr. Kristin Rojas: Yeah, great question. I'm glad you brought that up. We actually don't routinely do this in the MUSIC program, but it is an important aspect to think about today, because I don't know about where you are, but here in South Florida we have a lot of patients who are receiving therapies outside of the FDA-approved space and these are typically marketed as bioidentical hormones, which is a marketing term. Oftentimes, they'll get either transdermal formulations or pelleted hormone therapy that can result in really high superphysiologic testosterone or estrogen levels. And so we typically, for those patients, do try to get them off those non FDA-approved therapies because the safety of those is unknown.   Dr. Hope Rugo: That's really interesting and so helpful. Yes, I know this whole idea of bioidentical hormones drives me crazy, but I think that's great that you brought that up, actually. We do measure it. Who knows? I think if you're really worried, measuring “Yeah, everybody's hot flashes went away,” it's probably worthwhile checking.   This was such a fabulous conversation. I learned so much. We really appreciate your contribution to the educational manuscript, to the educational program, and your fabulous insights with us today. Thank you so much for participating on the ASCO Daily News Podcast. I think everyone will find this very helpful.   Dr. Kristin Rojas: Thank you so much for having me.   Dr. Hope Rugo: And thank you to you, our listeners, for joining us today. You'll find a link to Dr. Rojas and her colleagues' article in the transcript of this episode and in the 2023 ASCO Educational Book, which features practice-changing oncology research and a wide range of compelling studies on quality and equitable cancer care.    Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Thanks again.    Disclaimer:   The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.    Follow today's speakers:   Dr. Hope Rugo  @hoperugo  Dr. Kristin Rojas  @kristinrojasmd    Follow ASCO on social media:    @ASCO on Twitter    ASCO on Facebook    ASCO on LinkedIn      Disclosures:   Dr. Hope Rugo:  Honoraria: Puma Biotechnology, Mylan, Samsung Bioepis, Chugai Pharma, Blueprint MedicinesConsulting or Advisory Role: Napo PharmaceuticalsResearch Funding (Inst.): OBI Pharma, Pfizer, Novartis, Lilly, Genentech, Merck, Odonate Therapeutics, Daiichi Sankyo, Sermonix Pharmaceuticals, AstraZeneca, Gilead Sciences, Ayala Pharmaceuticals, Astellas Pharma, Seattle Genetics, Macrogenics, Boehringer Ingelheim, Polyphor  Dr. Kristin Rojas:   Honoraria: Pacira Pharmaceuticals  Consulting or Advisory Role: Roche Diagnostics, Merck  Research Funding (Inst): Bristol Myers Squibb Foundation       

Dr. Allison Zibelli, of the Sidney Kimmel Cancer Center – Jefferson Health, and Dr. Hope Rugo, of the Helen Diller Family Comprehensive Cancer Center at the University of California, San Francisco, discuss the practice-changing DESTINY-Breast04 trial as well as novel therapies in metastatic HR+/HER2- breast cancer from the TROPiCS-02 and MAINTAIN studies, all of which were featured at the 2022 ASCO Annual Meeting.   TRANSCRIPT Dr. Allison Zibelli: Hello. I'm Dr. Allison Zibelli, your host for the ASCO Daily News Podcast today. I'm a vice-chair and breast medical oncologist at the Sidney Kimmel Cancer Center, Jefferson Health in Philadelphia. My guest today is Dr. Hope Rugo, a professor of medicine and the director of Breast Oncology and Clinical Trials Education at the Helen Diller Family Comprehensive Cancer Center at the University of California, San Francisco. We'll be discussing key advances in breast cancer that were featured at the 2022 ASCO Annual Meeting. Our full disclosures are available in the show notes, and disclosures of all guests on the podcasts can be found on our transcripts at asco.org/podcasts. Hope, it's great to talk to you today. Dr. Hope Rugo: Nice to talk to you, too. Dr. Allison Zibelli: Let's begin with perhaps the most exciting abstract at ASCO this year, which was the DESTINY-Breast04 study, that's LBA3, a randomized phase 3 study of trastuzumab deruxtecan versus treatment of physician's choice in patients with HER2-low, unresectable and/or metastatic breast cancer. What are your thoughts about this study? Dr. Hope Rugo: Well, of course, this is a hugely practice-changing study as was noted in the second-to-last slide by the discussant [Dr.] Pat LoRusso. So, antibody-drug conjugates are really the next step in delivering chemotherapy to cancer cells. The antibody-drug conjugates allow targeted delivery of a toxin to the cancer cell. I think we didn't understand how important this was going to be. These second, sort of, verging on third-generation antibody-drug conjugates use an antibody approach and to then have a new generation of linkers, which allow the drug to be released locally, but to then have drugs which pack a big bang for the buck. So, the way antibody-drug conjugates are constructed, you need to have a drug that actually can't be given as a naked drug because it's too toxic because you're giving just very small amounts of this drug that are delivered directly to the cancer cell. And the other really critical part of this is that the drug-to-antibody ratio of at least the successful and new antibody-drug conjugates (ADC) is quite high in the 7.5 to 8 toxins per antibody. Now, what that's resulted in is really interesting, is that there's a bystander effect. So, the toxin itself can leak out of the cancer cell that it's targeted and kill neighboring cells, but also because of the construct of these antibody-drug conjugates, what's likely happening is even if the cancer cell's a very low expression of the target, really low, you're able to actually get that ADC into the cancer cell to kill the cancer cell. So that may be a big part of the so-called bystander effect. So trastuzumab deruxtecan is biosimilar trastuzumab linked to a topoisomerase inhibitor deruxtecan, and what happened here was that of course, we saw remarkable data in HER2+ disease, unbelievable p-values in DESTINY-Breast03 compared to T-DM1, a first-generation ADC. But in DESTINY-Breast04, we targeted a population of patients largely with hormone receptor-positive disease who had a little expression of HER2, 1 plus or 2 plus by immunohistochemistry and no gene amplification. And this trial, which randomly assigned patients 2:1 and included just 58 patients with triple-negative disease. So in this trial, 480 had hormone receptor-positive breast cancer, a median of 1 line of prior chemotherapy. They were only allowed up to 2. They were refractory to endocrine therapy, a median of 3 lines of endocrine therapy. In the overall patients and in the hormone receptor-positive patients, there was actually a doubling in progression-free survival (PFS). It started very early, and it continued throughout, and at every landmark analysis, T-DXd was better than the treatment of physician choice that patients were randomly assigned to. It's also important when you're thinking about trials like this to think about what the treatment of physician choice was, and it was all chemotherapy regimens we would use. Paclitaxel, nab-paclitaxel, capecitabine, eribulin, or gemcitabine. And, so, I think that that doesn't bring up any questions. When they looked at the hormone receptor-positive group, they saw, if anything, even a bigger benefit overall. Now, the other endpoint of this trial was overall survival, and at this first analysis, they saw an improvement in overall survival that was quite dramatic. The absolute difference was 6.4 months, which is pretty amazing for an overall survival difference. And then they looked at this exploratory endpoint at the 58 patients who were valuable at triple-negative breast cancer, and then that group of patients, also saw an improvement in PFS of 5.6 months, an improvement in overall survival of 9.9 months, very small group, but amazing data. The forest plots are exactly what you want to see, all the dots line up to the left of 1, and overall responses improved. One of the concerns with this drug has been toxicity. The toxicity showed no new toxicity signals, which is really important. Nausea is the biggest issue that we deal with. It's mostly grade 1 and 2, but still something that's important to manage. A little bit of hair loss, not much in the way of bone marrow suppression, which is interesting. Interstitial lung disease (ILD) or pneumonitis continues to be an important issue to follow. 12% of patients had ILD of any grade. Most of it was grade 1 and 2, but 3 patients died, representing 0.8%. So, this really highlights the importance of monitoring and managing pneumonitis. Regardless of that, few patients had a reduced ejection fraction, but again, very, in general, low grade. This is really a new standard of care, and the standing ovation was really due to the fact that all we do is dedicate ourselves to trying to help patients live longer and better with their cancers, and in this trial, we have a huge win that has no qualifications. We can help patients not only control their disease longer but live longer with T-Dxd compared to standard chemotherapy. Dr. Allison Zibelli: So, Hope, I know as a practicing medical oncologist, I find that our metastatic triple-negative patients are often the biggest therapeutic challenges for us. Will they be doing larger studies with these patients that are HER2-low? Dr. Hope Rugo: It's a really good point. About 65% of patients with hormone receptor-positive disease or so-called HER2-low, centrally confirmed in the study. So, a fair number of people, about a quarter, did not have HER2-low disease when they were tested centrally. In the triple-negative population, who really are ER, PR, HER2- by standard definitions, about a third of the patients might have HER2-low disease. So, there's a lot of interest in further exploring that and looking at the patients who have ultra-HER2-low disease, so between and 1 plus a little bit of expression. That's been studied in the hormone receptor-positive population in DESTINY-Breast06. But there's a lot of interesting further defining that triple-negative population, so to speak, they're going to be triple-negative plus now and understanding what the benefit is in that population. So definitely will be looked at more now moving forward. Dr. Allison Zibelli: Thank you. So, let's move on to Abstract 1002. And the results from the phase 1, 2 study of patritumab deruxtecan, a HER3-directed antibody-drug conjugate, and patients with HER3 expressing metastatic breast cancer. What are your thoughts about this study? Dr. Hope Rugo: That's a really interesting, another one of these second- to third-generation antibody-drug conjugates. It's just the antibody, instead of being the usual, sort of, HER2 or TROP2 that we're used to thinking about is directed to HER3, 1 of the HER family of proteins. This is interesting. There's actually been a lot of work trying to target HER3 with naked antibodies with disappointing results, although I have to say most of the studies really didn't push it too far. So, with this antibody drug construct, deruxtecan, which is the same as in T-DXd and another TROP2 ADC Dato-DXd is used. So, I will say they do need to change the toxin in the next generation of ADCs. But they looked at, at first did a dose-finding study which has previously been presented, and then a dose expansion in both hormone receptor-positive HER2-negative disease and triple-negative disease. All the triple-negative patients had HER3 high disease by immunohistochemistry, and the hormone-receptor-positive patients were enrolled in 2 cohorts, HER3 high and HER3 low. And the median number of prior treatment regimens that patients had received in the hormone-receptor-positive group was 6 and 2 for the triple-negative group, but there was a huge range, up to 13 lines of treatment. They only had 14 patients with HER2+ disease. So, it's a little bit hard to know what to do with that patient group, but they were heavily pretreated 5.5 prior lines of therapy. The confirmed overall response rate in the 113 patients with combined HER3 high and low was 30%, very impressive, heavily pretreated patients. For triple-negative disease all HER3 high, it was 23%. Again, very nice. And there were 14 patients with HER2+ disease that also were HER3 high. It was about 43%. So those are nice responses, but we always want to know how durable is that. The duration of response ranged from 6 to over 8 months in those 3 different groups. So, these were quite durable. It wasn't any 2- to 3-month duration of response. So very impressive. And then when they looked to see, did it matter whether you had HER3 expression that was high or low in the hormone-receptor positive group, they actually did see responses in the HER3-low group, some very good responses. Overall, there were less patients in that group, but it does suggest that maybe you would still see responses in the HER3-low group, very impressive. And then 1 really interesting correlative study they did was they looked to see what happened to the HER3 expression on the tumor cell over time, and it went down. So, you treated the HER3 expression in most of the patients just dropped off completely, which is really interesting. It didn't have any association with clinical activity, but it's sort of an interesting correlative endpoint. This is a drug that overall was pretty well tolerated. They saw a similar toxicity to T-DXd with a lot of nauseous, a little bit of alopecia, a little bit more bone marrow suppression than we're used to seeing with T-DXd. So, neutropenia was seen in about 10% of patients at the lower dose and about a quarter of the patients at the higher dose. Overall, pretty well tolerated. Now, interstitial lung disease is a toxicity with this construct, and they saw ILD of 7% but most cases were grade 1 and 2. The other interesting toxicity that's unique to this agent is thrombocytopenia. So, they saw a grade 3 or greater rate of thrombocytopenia of 27% in the lower dose group, and in the larger group that received the higher dose, 39% of grade 3 or greater thrombocytopenia, so platelets less than 100,000. Turns out that when you stop the drug, the platelets do come back, so that's a good thing. Sometimes we saw long-term thrombocytopenia with T-DM1. They didn't see bad toxicity like bleeding, but it is something that needs to be managed with this drug because we're not great at managing thrombocytopenia. In any case, it has fast-track designation for another solid tumor, not breast cancer, and we'll have to see where this fits into our dizzying array of very effective ADCs now. Dr. Allison Zibelli: The practicing medical oncologist is not used to testing for HER3 in our patients with breast cancer. How common is it? Dr. Hope Rugo: HER3 expression is quite common in hormone receptor-positive disease, a little less common in triple-negative breast cancer. So, I think that we would see expression if we were going to be treating patients with this particular approach. Dr. Allison Zibelli: All right. Let's move on to Abstract 507, which reported long-term outcomes of adjuvant denosumab in breast cancer, specifically fracture reduction and survival results from 3,425 patients in a randomized double-blind, placebo-controlled ABCSG-18 trial. What are your thoughts about this study? Dr. Hope Rugo: Well, this trial, this is an update of a study that previously has been presented and published, most recent publication was in Lancet Oncology in 2019, and these patients were randomly assigned to receive denosumab at 60 milligrams, important to note the dose, subcutaneously every 6 months versus placebo every 6 months, and they did get placebo subcutaneous injections. And this treatment continued through their endocrine therapy. They showed a dramatic reduction in fracture rate, and that has been maintained over time. We were really surprised enough to suggest that maybe Austrian people didn't go into the sun, so they got more Vitamin D deficiency, hard to know, but the hazard ratio is 0.5. It's unbelievable the number of fractures, 92 for denosumab but 176 for placebo, a P value of less than .0001. So, this is a real endpoint, treating patients who are receiving endocrine therapy that, in this case, non-steroidal aromatase inhibitor therapy that can increase bone loss, have a reduced fracture rate when they received denosumab. So that is the big take-home message, and a medium follow-up of 8 years. But the secondary endpoints included disease-free survival. They had about 20% disease-free survival events and 8% deaths, and what they saw was really interesting. So, the caveat is that 16% of patients were unblinded at the first analysis and half of them got denosumab, so it messed up their results a little bit, but the disease-free survival was significantly better in patients who received denosumab, and the hazard ratio of 0.83 and the hazard ratio does not cross 1. So that's very interesting, and even overall survival, they looked at 2 other endpoints, bone metastasis-free survival, and overall survival. They also trend towards an improvement with a hazard ratio of 0.8 for both of them. And they didn't actually see toxicity. So, patients' brittle bone fractures and osteonecrosis of the jaw (ONJ) are all concerning, but they really just did not see any risks in this patient population. I think there was 1 patient that had what they thought was a brittle bone fracture. Obviously, they watched the mouth very carefully as well. Really dramatic, and I think it's kind of disappointing that we never had any registration approach in this, and also not well-understood why the D-CARE study did not show a benefit, but I think D-CARE was designed differently. This is a better design to focus on our patients and the specific issues, and I think it's intriguing and should be considered as part of our treatment regimen for patients who are at risk for bone loss and have early-stage breast cancer on an aromatase inhibitor. Dr. Allison Zibelli: I've been using DEXA scans and offering denosumab to my patients on AIs that have osteopenia or osteoporosis. Should we be considering it in women with normal bone mass? Dr. Hope Rugo: I think not yet. Unfortunately, this trial was not immediately powered for cancer outcome, although the data are very encouraging. We don't know what the relationship is to bone loss, and providing an environment that's friendlier for cancer cells. So, do you have to have bone loss in order to have the risk that you're reducing with these agents? Certainly, that's what we've seen with zoledronate. So, I think that we don't have sufficient data to use this simply to treat cancer, but I do think that we should be considering this as an agent to give patients who have bone loss, either when you're starting an aromatase inhibitor or during the course of therapy. I think it's well tolerated, and a subcutaneous injection is not difficult. One of the questions that's come up for people is do you get bone loss that increases your risk of fracture after you stop therapy. But clearly from these updated data, these patients were off therapy. They did not have an increase of fractures and the patients treated with denosumab fared much better, I mean the hazard ratio of 0.5. Dr. Allison Zibelli: Let's move on to TROPiCS-02. That's LBA1001. This is a randomized phase 3 study of sacituzumab govitecan versus treatment of physician's choice in patients with hormone receptor-positive, HER2-negative advanced breast cancer. How do you think this study will impact practice? Dr. Hope Rugo: That's a great question. I presented this data, and I think I presented it on a Saturday, and on Sunday we saw the plenary talk of DESTINY-Breast04. These patients enrolled in TROPiCs-02 had a median number of lines of prior chemo 3 with a range of up to 8 actually, compared to a median number of lines as 1 in the DESTINY-Breast04 population. We included all hormone receptor-positive HER2 negative-advanced breast cancer, not centrally confirmed. They included just the HER2 low subset that was centrally confirmed. Everybody in our study had received prior CDK4/6 inhibitors compared to about 70% in DB04. And then 95% of patients in this trial had visceral mets. So, we did really treat a patient population who had very advanced high risk hormone receptor-positive breast cancer. As you know, we saw an improvement and progression-free survival with a hazard ratio of 0.66 meeting the endpoint. We needed a hazard ratio of 0.7, highly statistically significant P value .0003, but the median difference in PFS was only 1.5 months, and overall survival data is not yet mature. So that's brought up the question about how this drug should be used because there was a big fall off in the first 2 months where patients had rapid disease progression with heavily pretreated chemotherapy-resistant disease. We did landmark analyses and there were big separations in PFS at 6, 9, and 12 months, and 12 months, it was 21% patients free of progression and death at 1 year versus 7% for the TPC arm. So, it was a tripling of patients who were free of progression at one year. I think that's clinically relevant. This drug is associated with more neutropenia. That's the primary issue to manage, and probably half of the patients need growth factors at some point. When we looked at other endpoints response to ratio response, etc., we're better with Sacituzumab. So where does this all fit into our treatment paradigm. I think there's the HER2-low patients who will now receive T-DXd up in the, I hope, second line and not in lieu of endocrine therapy, when they're ready for chemo. But there are patients who don't have HER2-low disease and then there are patients who are going to be in the later line setting. So, I do think it still has a place in the treatment department, receptor-positive metastatic breast cancer. The results show that it was better than chemotherapy, physician choice based on our national and international guidelines, and that's better for our patients to have that option. Overall survival data obviously is looked for with great interest and that will help us put this into the right paradigm. And then I also hope that real world data will help us understand how sequential treatment with these different ADCs will benefit our patients. Dr. Allison Zibelli: This is really exciting. Do you think that we're maybe coming toward the end of conventional chemotherapy, especially for women with HER2-positive disease? Dr. Hope Rugo: I wonder if we are. I think we were interested in T-DM1 for HER2-positive disease early on. We've seen some really nice pathologic complete response data as well as adjuvant data in the attempt trial in patients who had stage I disease. Now that we have these second-, third-generation ADCs, T-DXd, I think this could potentially completely replace our chemotherapy. We still have to deal with alopecia. And I will point out ADCs are still chemotherapy. They're just a much more efficient and effective way of delivering treatment, and we need to be very careful to manage the toxicity. Dr. Allison Zibelli: Next, we're going to talk about the main pain trial that's LBA1004, which is a randomized phase 2 trial of fulvestrant or exemestane with or without ribociclib after progression on anti-estrogen therapy plus cyclin-dependent kinase 4/6 inhibition in patients with unresectable or hormone receptor-positive HER2-negative metastatic breast cancer, in other words CDK4/6 after CDK4/6. What are your takeaways here? Dr. Hope Rugo: First, just amazing that an investigator-initiated trial could do this well and be placebo-controlled. So, kudos to the principal investigator (PI) [Dr.] Kevin Kalinsky. This trial is a small phase 2 trial. A reasonable number, 119 patients were randomly assigned and evaluable patients could have received up to 1 line of prior chemotherapy for metastatic disease. If you had received prior exemestane, you received fulvestrant, if you received prior fulvestrant, you received exemestane, and actually if you looked at the number of patients who had received fulvestrant, it was 99 versus only 20 with exemestane. So important to keep in mind. If you looked at the overall population where the primary endpoint was progression-free survival, the hazard ratio is 0.57, just median PFS of 2.8 months in patients receiving endocrine therapy and placebo and 5.3 months for patients receiving endocrine therapy and ribociclib. So was this ribociclib after ribociclib or ribociclib after something else. 86% of patients had received palbociclib as their prior CDK4/6 inhibitor, and only about 10% to 14% had received prior ribociclib. So, there's a predominance of palbociclib followed by ribociclib. The other thing that's important to keep in mind is how sick this patient population was. Very few had received prior chemotherapy in the less than 10% range, visceral metastases in about 60%. So that's helpful. Only 19% or so had received 2 or more endocrine therapies from metastases. So, most people did this as their second line treatment. The PFS, when you looked at fulvestrant or exemestane, looked like the benefit was relatively similar, but you know you got 20 patients in the exemestane arm. The hazard ratios, looking at the subgroup analyses, all looked pretty similar, and the overall response and clinical benefit rate were better with continuing the cyclin dependent kinases (CDK) inhibitor. There was interesting sub-analysis looking at mutations and how that affected things. And they looked at patients who had ESR1 mutations or had wild-type ESR1. 42% had ESR1 mutations at study entry, very similar to what we've seen. In that group of patients, remember it's only 33 where they had this analysis, they saw a lot of other mutations. So p53, PIK3CA, FGFR, CCND1—those patients did not benefit. Only 33 patients. No benefit at all, very short PFS, about 3 months. The patients who had ESR1 wild type seemed to benefit a lot, 45 patients going from about 3 months to a little over 8 months. So, this is all hypothesis-generating data. I wouldn't run out and use this as your standard of care now because it is small data. But when the patient doesn't have other good options, I certainly would consider switching the CDK and going on, add that to the next line endocrine therapy. It's important to switch the endocrine therapy. I think we really need to look at the ongoing phase 3 trials to give us better evidence basis and understand the impact of mutations and prior therapy on who might benefit from continued CDK inhibitors after progression on a CDK inhibitor. Dr. Allison Zibelli: I think this is a really exciting trial. We all have a lot of patients on palbociclib and letrozole who've been on for 4, 5 years, and would like to continue with this kind of treatment because the side effects are really manageable. So, I look forward to seeing what's coming in the future with the phase 3 trials. So, let's talk about Abstract 1015, which I thought is a great idea. It looks at the quality of life with ribociclib plus aromatase inhibitor versus abemaciclib plus AI as first-line treatment of hormone receptor-positive, HER2-negative advanced breast cancer, assessed via matching adjusted indirect comparison. Could you tell us what matching adjusted indirect comparison is and why you chose this for the study? Dr. Hope Rugo: It's an interesting question. How do you compare across trials? So, matching this kind of make analysis, we'll call it a make analysis for the purposes of this discussion, allows you to match patients and weight based on their characteristics that might affect patient reported outcomes. And that actually is a way of trying to do a fair cross-trial comparison. So basically, take the study population, you match the inclusion and exclusion criteria, and then you weigh the different criteria so that you can try and make a better association. It's the best way we know of comparing across trials. You know, a lot of people ask why we didn't have PALOMA-2 in here, and that's because they used a different patient reported outcome tool. So, you have to use the same patient reported outcome tool in order to compare. So that's why we did this analysis, and it sort of came on the heels of a survey that Fatima Cardoso presented at San Antonio in 2021, where patients identified diarrhea as a symptom they really didn't like more than everything else. And you can imagine, I think we all have that experience in practice, the unexpected nature of diarrhea and the fact that it does limit your activities and, therefore, quality of life are important. In this analysis, interestingly but not surprisingly, ribociclib favored abemaciclib in diarrhea, and there can be associated appetite loss, so ribociclib also favored abemaciclib for appetite loss. And I thought the last one was interesting—fatigue—because I wouldn't have assumed that fatigue would be different. And maybe it's associated with diarrhea. They have these funny arm symptoms that were better. We don't really know why that was, and it's hard to assess again. We're really not clear based on the differences between the drugs. So, there are limitations to the analysis, but I think that it helps us really in individual patients try and match patients' underlying symptoms with the best treatment to offer them the best quality of life as they're being treated in the metastatic setting. Dr. Allison Zibelli: I thought this study was great because it really centered the experience of the patient and the wishes of the patient. You don't see that designed into many clinical trials, the way this was. So, I thought that was a great feature of this study. Dr. Hope Rugo: I will say that all of the 3 studies that looked at CDK inhibitors, all those 3 studies included patient-reported outcomes. That's an important new approach that is really being focused on. Dr. Allison Zibelli: Do you consider the CDK4/6 inhibitors equivalent in efficacy, and could you substitute them to try to get the side effect profile that you want? Dr. Hope Rugo: Well, I think that we saw in the early stage setting that there are differences. Now, across the different trials, there are big differences in patient populations and inclusions as we saw in the PALOMA-2 results that were presented at ASCO [Annual Meeting], whether the patients had prior chemotherapy like in PALOMA-3, whether they had a short disease-free interval, the higher risk patients in PALOMA-2. The PALOMA trials were more broadly inclusive than the other 2 studies, the MONALEESA and MONARCH series of trials. So, we do have to be a little bit careful about comparing apples to oranges, but we have the early-stage results of MONARCH E showing a clinically important difference in outcome whereas the PALLAS and Penelope-B trials didn't. So that sort of puts us into a little bit of a question period. Are these all patient populations or are there differences between the agents? The PFS and the metastatic setting, all the hazard ratios line up. So, in truth, although I know the activity against cyclin-independent kinases are different between agents, we don't still really understand the clinical differences in efficacy, but I think we all are practicing using evidence-based medicine. I wouldn't, for example, substitute a different CDK4/6 inhibitor for abemaciclib in the treatment of early-stage breast cancer. We have to just learn how to manage the diarrhea and use prophylaxis and dose reduce early to manage this and make it tolerable for our patients. And in the metastatic setting, I think we need to follow evidence-based guidelines and use the best data available to decide on the right treatment approach and sequencing for our patients. Dr. Allison Zibelli: Thank you, Hope, for coming on the podcast today. This was a really interesting review of one of the most exciting ASCO [Annual Meetings] I've been to. And thanks for sharing your valuable insights with us and helping us make sense of all this really new exciting data. We really appreciate it. Dr. Hope Rugo: Thank you. And thank you so much for inviting me. Dr. Allison Zibelli: And thank you to our listeners for joining us today. You will find the links to all the abstracts discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. That really helps other listeners find us. Thank you.   Disclosures: Dr. Allison Zibelli: None disclosed. Dr. Hope Rugo: Honoraria: Puma Biotechnology, Mylan, Samsung Bioepis, Chugai Pharma, Blueprint Medicines Consulting or Advisory Role: Napo Pharmaceuticals Research Funding (Inst.): OBI Pharma, Pfizer, Novartis, Lilly, Genentech, Merck, Odonate Therapeutics, Daiichi Sankyo, Sermonix Pharmaceuticals, AstraZeneca, Gilead Sciences, Ayala Pharmaceuticals, Astellas Pharma, Seattle Genetics, Macrogenics, Boehringer Ingelheim, Polyphor Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.

Dr. Hayes interviews Dr. Norton.   TRANSCRIPT SPEAKER 1: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement.   [MUSIC PLAYING]   DANIEL F. HAYES: Welcome to JCO's Cancer Stories, the Art of Oncology, brought to you by the ASCO Podcast Network, a collection of nine programs covering a range of educational and scientific content, and offering enriching insights into the world of cancer care. You can find all of the shows, including this one, at podcast.asco.org.   [MUSIC PLAYING]   Dr. Norton has stock and other ownership interest in Samus Therapeutics, Codagenix Inc, Martell Diagnostic, and Medaptive Health Inc. He's received honoraria from Context Therapeutics, Prime Oncology, the Sarah Lawrence Lecture, Context Advisory Board, Oncology Pioneer Science Lecture Series, Sermonix Pharmaceuticals, the Cold Spring Harbor advisory board, Codagenix, Agenus, and the Cold Spring Harbor external advisory board.   He has served as a consultant or provided advice to Context Therapeutics, Prime Oncology, the Context Advisory Board, Oncology Pioneer Science Lecture, Martell Diagnostic, Sermonix, Codagenix, Agenus, Medaptive Health, and the Cold Springs Harbor Laboratories. He has received expense reimbursement for travel and accommodations from the Oncology Pioneer Science Lecture Series, the BCRP Programmatic Review Meeting, the Breast Cancer Research Foundation, the American Association of Cancer Research, and Cold Spring Harbor Laboratory.   [MUSIC PLAYING]   Today my guest on the podcast is Dr. Larry Norton. Dr. Norton has been instrumental in so many facets of oncology it's hard to go through, but particularly, in breast cancer, and especially related to applying mathematical models of cancer kinetics that he developed with Richard Simon at the National Cancer Institute, and applying them really, to dose density strategies for chemotherapy and breast cancer, which we'll discuss. Dr. Norton was raised in suburban New York.   He received his undergraduate degree at Rochester University, his medical degree at the Columbia University College of Physicians and Scientists. And then he did his residency at Einstein Associated Hospitals in the Bronx. He then went on to complete a medical oncology fellowship at the National Cancer Institute from 1974 to 1976 and stayed there an extra year. And then he returned to New York and joined the faculty at Mount Sinai in 1977, where he stayed for about a decade.   He then moved to Memorial Sloan Kettering, where I think most of us think he was born and raised and lived his whole life. He's held many positions there. And particularly, he was responsible for really building the breast medical oncology service and starting the Evelyn Lauder Breast Center. He now sits in the Norman S Seraphim-- did I pronounce that correctly, Dr. Norton?   LARRY NORTON: Yes, you did.   DANIEL F. HAYES: Chair in Clinical Oncology, he's authored over 450 peer reviewed papers. He's won too many awards for me to list, as have most of my guests on this program. But in particular, he's won the triple crown, in my opinion. And that's the Karnofsky, the McGuire, and the Bonnadonna awards.   At least those of us in breast cancer would strive to win all three of those. And importantly to this series, he served as president of ASCO from 2001 to 2002, has served many roles at ASCO and has had a major footprint in where ASCO is today. Dr. Norton, welcome to our program.   LARRY NORTON: Great pleasure to be here. Thank you, Dan.   DANIEL F. HAYES: So we'll start with some of the origin stories. I know you weren't bit by a radioactive spider and got spidey powers. But I've known you for a long time.   And I know, really, your first love was music and that you started out to be a professional musician. Can you give us some background? What were your instruments? I know you went to Rochester specifically to be in music. And feel more than free to do some name dropping, because I think some of the people in music are people we'd all recognize.   LARRY NORTON: Well, I don't know whether that would be totally right. I've known a lot of people in music. My first love was music.   I grew up in Long Island, was able to commute in with one bus and one subway to Greenwich Village in the '60s, which was, really, the hotbed of much of what was going on in music to this day. I didn't even realize it was a golden age. I remember all the giants, Bob Dylan, when he was a very young kid in town, in small coffee houses.   But it was also in close proximity where a lot of the jazz scene was happening, and just to take the A Train would be very easy to get up into Harlem, where there's a lot of jazz things going on. Like a lot of kids growing up on Long Island, I had some musical education. I started off with the clarinet, went quickly into saxophone in terms of music. But I played a whole variety of instruments.   Like everybody else, I play guitar. I played percussion. I played bongos behind beat poets and was very excited to be really part of that scene.   I think one of the major turning points for me, actually, was the Vietnam War. Because like a lot of people of my generation, it did not seem to be reasonable war. And even McNamara wrote a book later saying, yep, sorry, it was a mistake. We were looking for things that could interest us and also help us serve our country in ways other than sacrificing our lives in Vietnam.   That's how medicine got into my life. It seemed to be the right compromise. Fortunately, starting off in Rochester which had the Eastman School of Music, which was a great influence on me, and a fantastic school, and has evolved continuously to be an even better school now.   It has a very active jazz program now, which didn't exist at that time. We had to do jazz on the sly, which was very easy to do, because there are a lot of jazz clubs in Rochester at that time. And it was really very easy to play jazz all night and then to play classical music all day. And that was totally, totally a great experience.   We were young. We didn't have to sleep at all. But I hankered to get back into New York. When the opportunity arose to go to medical school, I was fortunately chosen to go to Columbia, where I actually was able to play music and at the same time go to the medical school. But after a while, as all of us in medicine know, it becomes all consuming.   And so the medicine part of it just slipped. When it came to a lot of my friends from the old days up until the present day, very little performing, I've done a couple of benefits. I'll do the one namedrop with Elton John, because he's been so terrific at raising money for breast cancer research through the Breast Cancer Research Foundation. I had the great honor of being able to play with him twice--   DANIEL F. HAYES: How did you meet Elton John? I mean, it's not like you walk down the street and say, oh, hi, I'm Dan Hayes.   LARRY NORTON: Mutual friends, mutual friends in the arts, basically, one of our closest friends, close friend of his, close friend of mine, someone named Ingrid Sischy was a fantastic writer and editor, very involved with Andy Warhol in the beginning, and then continued a career in art criticism and art writing. And she was a friend of everybody and a close friend of Elton's and a close friend of mine. And so I think she made the original introduction. And he's really been terrific.   But the music is put aside, although I do play every day. I still keep that as a very important part of my zen escape from other stresses of life. Although, music itself has its own stresses.   The good thing about jazz is improvisation. So it's an immediate feeling, no such thing as a wrong note. You hit a wrong note, and you play around it. And it becomes a right note. And so music is still a very important part of my life.   DANIEL F. HAYES: That's terrific. Actually, I interviewed Hyman Muss a few weeks ago. And he and some others have introduced me to tying flies for fly fishing.   And it's sort of the same thing. I can take 15 minutes and tie a fly. I'm not sure it looks like anything official-like. But it's not medicine for a while, and that's good.   LARRY NORTON: Yeah, but medicine--   DANIEL F. HAYES: The other thing--   LARRY NORTON: I want to get back to this for a second, because I mean,   DANIEL F. HAYES: Yeah.   LARRY NORTON: It's not a separate thing. I mean, music and-- especially my early music education just taught me a lot that's really helped me in my career in medicine. I think it's very important for people to know. The talent for music is a talent to practice.   Essentially, anybody who can speak can-- has enough control of tones that they can actually do something with music. I'm not sure how much is really inborn ability. I'm not sure there is such a thing as a talent in that regard. But some people can practice for long hours successfully. And some people can't.   And I think that that's something that may be inborn. I don't know. I'll leave that to the developmental psychologists. But that is a very important trait, obviously, in medicine.   You have to spend a long time studying. You have to learn a lot. You have to concentrate a lot. You have to be able to concentrate on individual patients, when you're taking care of them. And that's been very important, but it's also empathy.   Music teaches you to feel what other people are feeling. You're not going to be a good musician unless you know how you're affecting your audience in a profound way. And you can sense when you're losing your audience, and you can change the direction you're going in. And when you hit something right, you can play it.   And that ability to feel what other people are feeling, I think, is really essential to be a good clinician. And music teaches you that. I think arts in general teach you that.   DANIEL F. HAYES: Actually, I hadn't thought about it. Do you think that your music and your mathematic leanings are tied together too?   LARRY NORTON: There is a tendency for mathematicians to be musicians, not true quite vice versa. Although they are-- good musicians really are mathematicians. But they don't know it.   A lot of people think math is the written equation, and it's not. It's a certain approach toward nature. Thinking in spatial ways, for me, thinking of shapes, and the way shapes form, the way shapes move over time and space, then you learn the tools for being able to write it down which is the actual mathematical notation.   DANIEL F. HAYES: Yeah.   LARRY NORTON: And the same thing with music, I mean, music isn't the notes on the page. I mean, that's a very poor reflection of what sounds you're making. It's the sounds. It's the sounds, and they go up and then down. That's spatial, and they go forward in time.   And so they're temporal, and they have meaning. It's not just random sounds. They have meaning. They connect to each other, and they tell a story, as we say in the jazz world. And the notes are a poor reflection of that.   Some of the best musicians I know can't read music. And as a matter of fact, it used to be said that if you want to be good jazz musician, you shouldn't learn to read. Because if you learn to read, you'll cheat. And you should be able to play by ear. And that's what's going to make you a better musician.   So I think math and music are very closely aligned. You have a problem to solve, when you think about it, and in novel ways that are not verbal. And the non-verbal way of thinking in music and in math are very similar, I think.   DANIEL F. HAYES: So let me segue onto how you changed paths. I know that it was-- I've heard you talk about it was a discussion with Dr. Ron Bloom, who I think has remained a good friend of yours, and then in association with Dr. Regelson at Roswell Park. Can you tell us about that?   LARRY NORTON: Well, Ron got me-- I mean, Ron, great, great oncologist, retired now, and his wife Diane also very, very important in the cancer world through her leadership of organizations. They both went to University of Rochester same time I did. I was actually perplexed at the end of one semester.   So both Ron and Diane were at the University of Rochester, the same I was. And I was perplexed at the end of one semester, because I had several opportunities to do things in the summer coming forward. One of which was very music oriented, and it was a very exciting possibility. But I was at that time considering a change in direction very strongly.   Math was one of the things that was drawing me. The question, should I become a professional statistician? That was the course that was turning me on mostly at that time. I thought physics was an incredible art form and was intrigued to that.   But I also had music that was drawing me. And also the question, of what could keep me helping people, and helping my nation, and keep me from necessarily bearing arms in Vietnam was a big concern. And I met Ron on the stairs of the Rush Rhees Library at the University of Rochester, a famous library, that by the way, has a famous ghost associated with it. That's a whole different story.   He said that he had this unbelievably wonderful experience the previous summer by working at Roswell Park Memorial Institute in Buffalo, New York State Cancer Research Institute, particularly under a guy named William Regelson who was just totally inspirational to him. And that was one of his major motivations to spend his career in cancer medicine, which I didn't even know it. I had another connection to Bill Regelson is that my father and his father actually knew each other. Because they were in businesses that touched.   His father ran a Catskills resort. And my father was a professional writer and travel editor at The New York Post. And so that there was that connection. So that when I relayed the story to my parents, they said, oh, we know Regelson.   So well, one thing led to another. And on a cold and rainy night, I took a bus into Buffalo, New York. And I met Bill Regelson in the laboratory at Roswell Park Memorial Institute.   It was late at night, and it was freezing rain, kind of miserable night. And he asked me a lot of very tough questions and was not very pleasant toward me. But the end of the interview, he says, I like the way you think. And I'd like to offer you an opportunity to work with me this summer.   And I jumped at that opportunity. And it was really, truly the turning point in my life in many ways. Because I, eventually, many years later ended up marrying Bill Regelson's daughter. My current wife--   DANIEL F. HAYES: I was not aware of that.   LARRY NORTON: Yeah. Rachel, the love of my life, it was an extraordinary experience, because I got very close to family. And she was in New York at Columbia, at Barnard, the same time that I was in medical school. And so that's how it all came about.   But anyway, Bill was really an inspirational character for many people of my generation who were in contact with him. Because he was just filled with enthusiasm, and energy, and optimism. You remember, the early days of oncology were very special. And by the way, if you want to catch a glimpse of that, it tends to be this book, The Death of Cancer. I'm giving it a big plug, fantastic book that captures the whole history of his life and cancer.   But the early days is very important for people to recognize what it was like in those early days. It was just an enormous challenge just to get people to pay attention. The possibility that drugs could actually be useful in the treatment of cancer, and it was often ridiculed. I can tell you a little story later about my early experiences when I came to New York in that regard.   DANIEL F. HAYES: So did you know you were going to be an oncologist when you went to med school? Or did that--   LARRY NORTON: I'll tell you two of the turning points in that regard that I think are particularly interesting. One is, at the very beginning of that summer, Bill Regelson brought me-- in those days, the labs were right next to the clinic, the inpatient service. And he brought me right from the lab a few steps in to see a patient who was admitted to the hospital with a pelvic tumor.   I don't know what type, didn't register in my mind at that time, but a pelvic tumor that had grown very large. And it actually had eroded out into the skin and was large, and infected, and bleeding, and just awful. And the patient was in terrible pain.   And he said, we're going to treat this patient with a new drug that I think is going to help her. And it's called methotrexate. And he treated with methotrexate, and I saw the I saw the medicine go into her arms.   And over the next few weeks, during that summer, I saw this tumor shrink down. I saw the skin heal over. I saw the pain go away. And it was, I'm seeing this monster eating this woman from the inside out. And I'm seeing just this yellow chemical going in there, and the monster being defeated.   It was like magic. It was something just beyond conception that, actually, you could take something that awful and that terrible, and actually give it medicine, and actually make it go away. And I said, this is a world I can't turn my back on. This is a world I have to be in.   This is just a magical, wonderful world, where you can actually heal things that couldn't be healed by other ways, I mean, totally beyond surgery, totally beyond radiation. And here's medicine going in. So that hooked me.   But at the very end of the summer, and toward the very end of my time there, another thing happened which would be a good segue. But also very important is the real person running medicine A at Roswell Park at that time was this person named Jim Holland. And Jim Holland was not there all summer, because he was riding a horse. And he had his daughter, one of his daughters on the horse.   And the horse was acting very, very jittery. And he was a little afraid of what the horse would do. So he went close to a fence, where he could actually unload the daughter, so she can grab on to the fence. And the horse didn't bolt and crushed his hip against the fence.   And so he was out with a fractured hip or pelvis the entire summer. But he was well enough toward the end of the summer to come in and speak to the summer students. And he came in, and he sat in a chair in the middle of the room. And all the summer students who gathered around him-- if I thought Bill Regelson had energy, to see this tornado of a personality in the room, with his loud booming voice and his probing questions, his clear intelligence and enthusiasm for his field and dedication to it was just inspirational.   And so it was a crescendo of a summer for me. And that was it. The experience of Bill Regelson, the experience of Jim Holland, I knew that I was stuck. And even though other things were attracting my attention, nothing was going to capture my life as much as the medical oncology.   DANIEL F. HAYES: You went on then to work with him for 10 years at Mount Sinai.   LARRY NORTON: Right.   DANIEL F. HAYES: In addition to what you've said, his obnoxious ties also always stood out for the rest of us. But those 10 years must have been unbelievable. Because the guy never quit thinking, at least in my experience with him.   LARRY NORTON: I mean, there's so much to say about Jim Holland. I had the honor to speak his funeral, the sadness to speak at his funeral, but it was the honor to speak at his funeral related some of the stories. But there's so much to talk about him that it's actually worth a whole book, even an opera, with the bigger than life personality he was.   But he captured something that I think was very important. And some of the early pioneers that we were talking about before really captured which is, I mean, these were real pioneers. I'll just give you a little side story. I mean, I came into grand rounds once, when I was working with him late, as I usually am to pretty much everything.   But nevertheless, I came in a few minutes late, and everybody was gathered around. And I remember it was a thoracic specialist, a pulmonologist, who was actually conducting grand rounds. And as I walked in the door, he says, how come you're late, Larry? Were you out there saving lives?   And everybody roared into uproarious laughter. Because medical oncology was the last step before the cemetery. Hopeless situations would all come to us. And then we'd give them drugs and not help people whatsoever.   And of course, I felt this deep humiliation. I was a young doctor at the time, and all these great, senior people, great luminaries were arrayed around. But that was the attitude of a lot of people in medicine at that time is that hopeless situations, send it to them, they'll take care of it. They'll hold hands, whatever.   And to see where we are today, and how many cases we cured, and how many patients we've cured, and how well we managed things, certainly, we don't cure enough. And you and I and our whole community is working hard on that. But we do cure a whole lot of people, and we do help their lives.   And we do keep them functioning for a longer period of time with the medicines. So the people that went into the field at that time and actually established the field of oncology, medical oncology, at that time were really had to have a real pioneering spirit. And so Tom Frei obviously pops to mind in that regard, and many others. I could give a long list--   DANIEL F. HAYES: Well, I should say, I had the great privilege of training with Tom Frei and the pleasure of interviewing Dr. Freireich who, sadly, passed away a few weeks ago. I did not get to interview Dr. Holland. But because of his friendship with Dr. Frei, Dr. Holland adopted me as well, even though I was never working with him directly.   And the three of those guys, I think our listeners need to understand, they were really cowboys. And they did things that we would now just, I think, repel, just have you can't do that sort of thing. But they did it, because they had to. As you said, there was nothing else to do. It took a special personality.   LARRY NORTON: Totally-- I mean, everything you're saying is-- I agree with. But also, that's why we are where we are today is because they took chances, because they had a vision, and they attacked that vision very, very aggressively. And I'll do one more namedrop in music that is one of my and still friend is Quincy Jones.   And Quincy Jones had this wonderful phrase in terms of jazz improvisation that was really very important to me. Sometimes, Larry, you have to jump without a parachute. And how do you get into an improvisation? You just start.   And then it has a life of its own. And the better you get, the more experience you get, the better you start it, and the better you're going to develop it. But you just got to start. Hit the first note, doesn't matter what it is.   And that kind of spirit of jumping in into it was really, very important. And I think that's something I really miss from modern oncology. If we're going to talk about where we are now compared to where we are then, a lot of things have changed that are very positive.   Obviously, the amount of science that we have to draw from now is just astronomically greater than what we had in the early days, when we're talking about very primitive things. The whole Norton-Simon thing was all about attacking cell division, the best way of attacking cell division. We're so far beyond that in so many ways. That's one of the bigger changes.   Our access to information, I mean, I had a question. I have to go to the library and got to cart catalogs, and pull books off the shelf, and open them up, and spend hours and spend days finding out one piece of information that now I can find out in about 15 seconds, if my fingers are slow on the keyboard, 15 seconds. And so that's it.   But one of the major things is that it was all about concepts then. It was all about principles. The principle that antimitotics could actually make tumors shrink and could be beneficial. That's a principle.   Combination chemotherapy is a principle. Dose dense sequential therapy, if you take it into further development of my area as a principle. And the overarching concepts on patient centrality of it also is that the early clinical trials were very small trials. Because each and every patient was a valuable piece of information.   They were almost collections of anecdotes. And obviously, we've evolved way past that in very positive ways. But what you learned from the individual patient was extremely important to that generation of pioneers rather than large numbers. And I think we moved away from that.   DANIEL F. HAYES: Actually, I'm going to interrupt you, because I think almost everybody I've interviewed has stories like you started out with. I saw a patient who I couldn't believe responded to X or Y. And I have the same stories.   And I'm hoping our young folks still believe that's as important as filling out the meaningful use things on their documentation. I told my own son, I want him to be a doctor and not a documenter. You need to document, but you need to be a doctor. Can I segue into--   LARRY NORTON: We ought to spend the whole podcast on that topic someday.   DANIEL F. HAYES: No, yeah, let's do that.   LARRY NORTON: Because the thing is-- well, because I think that the thing is, when you're taking care of a patient, and you're thinking, obviously, we're always thinking what's best for the patient, all of us. But you're also thinking of gathering information in a verbal way about the patient. So you can talk about that patient to your colleagues, or write it as case reports, a series of case reports is a different mindset than when you're thinking about how am I going to fill out my electronic health record?   And I think the mindset differences, and I frequently say to the younger people that I teach or that I'm in contact with, that they grew up in a digital world. And I grew up in an analog world. And the way you think in an analog world is very different than the way you think in a digital world. Maybe it's for the better. I mean, only history will tell, but I just miss that kind of analog thinking. Much of what we have today is because of it.   DANIEL F. HAYES: Let me take you into your role in modeling and especially with the so-called Norton-Simon hypothesis. How did you hook up with Richard Simon? And what did he teach you? Because I find him to be a fascinating person.   LARRY NORTON: Oh, a fascinating person, and obviously, one of the really important people in my professional career. The math was in there. Because along with, I mean, I studied math. I had studied math in college, and I was--   DANIEL F. HAYES: I should-- describe it. Just for a minute, describe what it is for our listeners.   LARRY NORTON: Oh, the Norton-Simon hypothesis and the--   DANIEL F. HAYES: Yes.   LARRY NORTON: All right. Oh, yeah, well--   DANIEL F. HAYES: Briefly, briefly.   LARRY NORTON: It's very simple is that way before my time, Skipper Schabel and colleagues at Southern Research Institute had described the way experimental tumors in their laboratory grew which was exponential. And they made the observation called the Log Kill hypothesis, which is the Log Kill rule which is a given dose of given drug kills a percentage of the cells that are present rather than an absolute number of cells, which is actually counterintuitive. It shouldn't be that way if you think about it in terms of biochemistry, but it is that way.   And we were all taught the Skipper Schabel model and Log Kill hypothesis. We were all taught that. And I was in the clinic taking care of a patient with Hodgkin's disease, nodular sclerosis Hodgkin's disease. And this patient had [INAUDIBLE] involvement with Hodgkin's disease.   Remember, I was working with Vincent Davita, a great influence on my life, Bruce Chabner, Bob Young, many people who-- George Canellos, who you know very well, great luminaries doing lymphoma therapy as a clinical associate at the National Cancer Institute. Hampton's patient is they had to Hodgkin's disease, got MOPP chemotherapy, roared into complete remission. Basically, two cycles of MOPP, was in complete remission. I've been involved in oncology since the early days of MOPP to show you how long I've been involved in oncology.   And I got four more cycles, because we give six cycles no matter what. We're two cycles beyond complete remission in that setting. And it was about a year. And the patient came back with mediastinal lymphadenopathy. The biopsy showed that was exactly the same lymphoma. Put him back on MOPP chemotherapy, and he responded again and went back into remission.   I don't recall whether it was complete remission or partial remission. And I said, this is really fascinating, because the math was already in my head at the time. Because I thought I want to graph it out and show how well it fit the Log Kill hypothesis. And it didn't fit at all.   I mean, it just didn't make any kind of sense. From a mathematical point of view, you couldn't make the equations fit. And about that same time, I became aware that others were describing that tumors were not really growing exponentially-- solid tumors were not growing exponentially as Skipper had shown in his laboratory models, a certain leukemia named leukemia 01210.   But rather, by a very strange curve called a Gompertz curve, which was developed in 1825 by Benjamin Gompertz to fit actuarial data, actually, not anything in terms of biology. And that's an S shaped curve. So it looks exponential at the beginning. And then it bends over and eventually seems to try to reach a plateau size.   And so I went back, and I applied the Skipper Schabel model mathematically to the Gompertz curve. And I realized that, for this individual patient, it would make a whole lot of sense if the tumor, when it was growing quickly, regressed more than when it was growing slowly at a very large size. In other words that the hypothesis is that the rate at which it would shrink is proportional to its rate of growth.   And since, in a Gompertz curve, the rate of growth is always changing, the rate of shrinkage changes as a function of time as a tumor shrinking down. And that was of germ the idea. And then the question is how to test it.   Under contract Arthur Bogden in Massachusetts did some animal modeling for us. And we published my first paper actually that showed tumors were growing in a Gompertzian fashion. And in fact, a subsequent paper showed that they regressed also in the Gompertzian fashion which is what the Norman-Simon hypothesis is.   Almost immediately thereafter, a couple of implications, in terms of cancer therapeutics, and I want to get back to that. Remind me to get back to that later on. Because this is around 1977 or so that all this was really becoming clear.   So it was actually one patient that made me think of it. I mean, frankly, it was one patient's experience that made me think of it. And that's what you were saying before, Dan, is the importance of learning from each individual patient.   DANIEL F. HAYES: And actually, it's gone on to be tested in many, many trials. But probably the most definitive was run by Marc Citron and CLGB under your guidance. And I just want to say a few words, because Marc passed away just a few weeks ago. He was really instrumental in ASCO and very, very generous to the foundation. We'll miss him greatly. But that trial of 97--   LARRY NORTON: 41.   DANIEL F. HAYES: 9741, demonstrated that dose density was superior to giving things in big doses for longer periods of time. Let me ask you about--   LARRY NORTON: I just want to second there what you're saying about Marc. I mean, just an incredible human being, an incredible person, incredible clinical scientist, and he was actually the first community clinician to chair a major national trial from a co-operative group which was just an intentional decision. I believe, you were involved in that decision, actually, Dan, Hyman Muss, certainly.   DANIEL F. HAYES: Marc and I started in a group at the same time. And we grew very close. I miss him. Let me ask you to look into your crystal ball for a minute and that is with precision medicine and targeted therapy. Does the Norton-Simon hypothesis still apply to that? Do you think chemotherapy still--   LARRY NORTON: Oh, yes. Oh, yeah, yeah. Well, first of all, I mean, I'm not-- now we're getting into sophisticated science topics here. But the thing is that I'm not, to this day, I'm not sure I have chemotherapy works.   I don't think that all of chemotherapy effect is just killing dividing cells. First of all, it's mathematically impossible. Does chemotherapy, does cytotoxic therapy affect the relation cell to its microenvironment? Does it affect its relationship to the immune system? These are all things that are under active investigation and active study at the present time.   There's more to what we do every day in terms of giving chemotherapy than just killing dividing cells. Chemotherapy can be very precise. I mean, methotrexate and dihydrofolate reductase, we talked about it before. It's very, very precise therapy, hormone therapy, tamoxifen and the estrogen receptor.   So we've been talking about precision medicine for a long time. It's just that our level of sophistication in terms of likely targets has changed. But still, it works. It's a law that fast things, things that grow faster regress more quickly than things growing more slowly how you return them. And I think that there are important lessons there that we still have to learn about cancer biology.   And that got me into some very exciting areas with [INAUDIBLE] and colleagues and to cell seeding theory with cancer, for example. And that story is evolving. And more data is becoming available there and much more sophisticated mathematics that will apply to those days that I hope I will have time to work on in the next few years to be able to actually establish those principles.   But I still think that we're doing something wrong if you're talking about a crystal ball which is that-- and it relates to what I just said before. We're so self-hypnotized into thinking that cancer is a disease of cell division. The vast bulk of our targeted therapeutics are oriented toward molecules that are related to mitosis.   You hear talk, that'll be a very specific talk about molecular pathways starting with genomics and [INAUDIBLE] signaling. At the end of the slide, it says, invasion, metastasis, and growth. It's a nice little package. And that's the answer. Well, I mean, that's a big cloudy area.   I mean, those are different things. Those are separate things. Those all have their separate biology. But they're all related. It is totally true.   And how are they related? And why are they related is one of the very important topics that we have to wrestle with, because that's what we really have to perturb. And I think that the, again, crystal ball guessing, or at least where I'm putting my energies now is we have all these incredible tools for developing medicinals that can attack molecules.   Are we attacking the right molecules by focusing in cell division? Should we be looking more toward perturbing tumor microenvironment relationships? Should we look at more sophisticated ways of using the immune system as one element in the tumor microenvironment, one of many in the tumor microenvironment, to accomplish the goals that we have to accomplish?   And are we actually looking at the right things in terms of molecular analysis in cancer by looking at pathways that are concerned with cell division primarily and secondarily with other things? Or should we be looking at molecular networks and molecular pathways in a more sophisticated fashion? Just like the early days of oncology, we have to be willing to take intellectual chances. And that's something I'm seeing much less of now than I did if you go back half a century.   DANIEL F. HAYES: We can go on with this one for a long time too. And we probably will the next time we get to sit and have a drink together when the pandemic goes away. I think it relates to dormancy. And I don't think we understand dormancy or how it is broken and how to treat it.   I have two things, and we're running out of time. One of those is you probably, in my opinion, have been the king of understanding the importance of philanthropy in our field, especially in relationship to what I see directly, which was your relationship with Evelyn Lauder and her husband, Leonard, of course, in the Breast Cancer Research Foundation. But I'd just like you to emphasize to the folks coming in the field how important that philanthropy is.   I think some of them believe it's dirty to get involved with that and ask people to give money. And you and other people I think have taught a lot of us that these folks want to help us. And it's important to address that in a dignified way.   LARRY NORTON: We're all in this together. I mean, I think that's the important thing to recognize as a physician or as a scientist. I said in a paper once that just as all of us are either actual or potential healers, all of us are actual or potential patients.   Cancer is a very important problem that needs to be solved. And people have to solve in every way they can, with our intellectual ability, our hard work in the clinic, our hard work in the laboratory. And people who are working hard in other fields who accumulate some element of wealth, or even people that just in normal life contribute small amounts, a lot of people doing small amounts adds up to a lot of money also. I mean, they're all part of the same process.   I mean, the importance of philanthropy is that-- and it goes back to what Evelyn said which I quote all the time. She was very instrumental in the building of our first breast center at Memorial Sloan Kettering and then our second breast center, which is freestanding building at Memorial Sloan Kettering. She and Leonard involved in every way and not just in terms of philanthropy, but actually thinking through the problems and helping solve them and design in every way.   When we built the first building that we had, we actually raised a little bit more money than we needed for the actual physical structure. So the question is, what to do with it? And obviously, a research fund at Memorial was established.   But then in terms of where else to go with it, she invited me over to her place in New York overlooking Central Park. And we sat in the kitchen, and we drank tea. And I said, what I perceive, and with my colleagues, I'm not the only one, obviously, who's perceiving this, is an explosion of science, basic science in understanding cancer, and an incredible collection of clinical investigators that can do clinical trials, and do large clinical trials as well as pilot clinical trials in our institutions. But I didn't see the connections being very tight. Because we were in different worlds, speaking somewhat different languages.   And we had to tighten those connections somehow and do something translating scientific advances in the laboratory into clinical benefit. It also allowed the scientists to understand what the clinical problems were and how to have the approach, and how we're going to do this. And she said, I've worked around creative people all my life in my professional life. And I know, you've got to identify the right people first of all.   So that's a little bit of a talent. But that the main thing is that when you identify them, you've got to give them freedom to use their imagination and the security to know that if they do something good and it doesn't work out, that they're not going to lose their job. Freedom and security is the secret of making progress in the field.   And I said, that's what we need. We need a foundation that can give the right people the freedom to use their imagination and the security to know that as long as they do good work, they're not going to lose their funding in a more traditional grant mechanism. And that's really where it started. So the whole thing is all based on that, is to get the right people and to give them freedom and security. And another part of it I just want to mention is networking to give people--   DANIEL F. HAYES: So let me focus this.   LARRY NORTON: OK.   DANIEL F. HAYES: Breast Cancer Research Foundation, how many people are you supporting? And how much money did you give this year? Just to give--   LARRY NORTON: Oh, about, oh, I mean, it's about 200 or so or more than that. Investigators, it's international at the present time. This year has been a tough year, and the next few years probably, because of COVID, because of the pandemic.   It's been a tough year. But in general, we've probably given away about a billion dollars. But it's not given away. It's actually an investment, investment in the future.   DANIEL F. HAYES: Yes. I agree.   LARRY NORTON: And it's all about bringing people together. New investigators come in, and they're used to gladiatorial combat when it comes to grant acquisition is that they have to fight against the people to beat them out. And what we reward is people working together and sharing ideas. And phenomenal things have occurred in that direction, phenomenal, huge programs in metastasis and molecular biology, Translational Breast Cancer Research Consortium which has been a fantastic thing that we've helped support. So it's really been a joy.   DANIEL F. HAYES: It's been great. Final 1 minute, the other thing you've done as well or better than most is mentoring. And I personally want to thank you for helping me in my career.   But probably, your greatest success is mentoring Cliff Hudis who's now the CEO of ASCO and is responsible for ASCO continuing to be probably the world's greatest oncology professional society. Actually not probably, in my opinion, for sure. So for that, I thank you.   We've run out of time, unfortunately. I think you and I could go on for another hour or so with this stuff which is what's fun about my getting to do this. But I want to thank you for all you've done for the field, for all you've done for so many of us in the field, and most importantly, for the patients who have benefited from what you've done.   It's pretty remarkable. This has been so much fun for me to get to interview so many of the pioneers. But you certainly rank up there at the top. So thank you very much for your time and look forward to talking to you later.   LARRY NORTON: Thank you so much for the kind words and for inviting me to do this with you, Dan. Thank you.   [MUSIC PLAYING]   DANIEL F. HAYES: Until next time, thank you for listening to this JCO's Cancer Stories, the Art of Oncology podcast. If you enjoyed what you heard today, don't forget to give us a rating or review on Apple Podcasts or wherever you listen. While you're there, be sure to subscribe so you never miss an episode. JCO's Cancer Stories, the Art of Oncology podcast is just one of ASCO's many podcasts. You can find all the shows at podcast.asco.org.   [MUSIC PLAYING]

Dr. Kelly Shanahan is a metastatic patient advocate and METAvivor board member. She had to give up her OB/GYN practice because of side effects from metastatic breast cancer treatment. At the 2019 San Antonio Breast Cancer Symposium, Dr. Shanahan was one of the moderators of a panel sponsored by Breastcancer.org and Sermonix Pharmaceuticals on the sexual side effects that breast cancer treatment can cause. As a dual citizen of this discussion — she's both a metastatic patient who has experienced some of these side effects and an OB/GYN who used to treat people for these side effects — she's uniquely qualified to help us all understand the topic and offer solutions. Listen to the podcast to here Dr. Shanahan explain: her personal journey with breast cancer why anti-estrogen medicines and chemotherapy can cause vaginal dryness, vaginal atrophy, and pain during intercourse some of the causes of loss of libido solutions to some of the most common sexual side effects, including vaginal dryness and thinning, pain, lack of desire, and hot flashes Running time: 37:20