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28 JAN

JCO PO Article Insights: Circulating Tumor DNA in Germ Cell Tumors

In this JCO Precision Oncology Article Insights episode, host Dr. Jiasen He summaries the article, "Longitudinal Evaluation of Circulating Tumor DNA as a Prognostic Biomarker to Detect Molecular Residual Disease in Germ Cell Tumors," by Hassoun et al. TRANSCRIPT Jiasen He: Hello, and welcome to the JCO Precision Oncology Article Insights. I'm your host, Jiasen He, and today, we'll be discussing the JCO Precision Oncology article, "Longitudinal Evaluation of Circulating Tumor DNA as a Prognostic Biomarker to Detect Molecular Residual Disease in Germ Cell Tumors," by Dr. Rebecca Hassoun and colleagues. Traditionally, treatment response for solid tumors has relied on imaging, which focuses on visible anatomic changes in the tumor. However, imaging does not always reflect molecular or cellular changes and cannot detect microscopic disease, which is clinically important and often linked to relapse. Liquid biopsy, on the other hand, is minimally invasive and can be used for cancer monitoring by analyzing circulating biomarkers in biofluids such as blood. One type of liquid biopsy is circulating tumor DNA, or ctDNA, which measures small fragments of DNA released by tumor cells into the bloodstream. ctDNA can allow precise monitoring of tumor-specific mutations and be a powerful tool for assessing treatment responses. ctDNA has already been applied in clinical settings for cancers such as non-small cell lung cancer and breast cancer, etcetera. However, there is still limited data on the use of ctDNA for germ cell tumors. Germ cell tumors are the most common malignancy affecting men aged 15 to 35 years. Accurate risk stratification and disease monitoring is key to risk-adapted therapy, maximizing the chance of cure while minimizing side effects. One unique tool we use currently for diagnosis, staging, and monitoring is serum tumor markers, such as AFP, beta-hCG, and LDH. However, these markers have limitations, including false elevation in certain clinical scenarios, and studies have shown that they can be normal in up to 40 percent of patients with germ cell tumor. This creates an unmet need for other sensitive and specific biomarkers to improve patient care. In this paper, the authors investigated the use of ctDNA in a cohort of patients with germ cell tumor at various disease time points. They compared ctDNA results with traditional serum tumor markers to evaluate whether ctDNA can predict relapse and survival outcomes. This multi-institutional retrospective study included patients with stage I, II, and III germ cell tumors, primarily testicular cancer, who had at least one ctDNA test result. ctDNA was evaluated longitudinally at different time points, including pre-orchiectomy, during the molecular residual disease, or MRD, window, defined as 1 to 12 weeks post-orchiectomy but before primary therapy, and during the surveillance window, defined as more than 12 weeks post-orchiectomy or follow retroperitoneal lymph node dissection or post-chemotherapy. ctDNA analysis was performed using a tumor-informed 16 multiplex PCR next-generation sequencing assay. A total of 324 plasma samples were analyzed from 74 patients in this cohort. The majority had stage I disease, around 40 percent, and nonseminomatous histology, around 70 percent. 15 patients were evaluated in the pre-orchiectomy window, and only one patient tested negative for ctDNA. This patient had stage I disease. The authors further assessed ctDNA positivity in both the MRD window and surveillance window, evaluating its association with event-free survival. They found that ctDNA outperformed serum tumor markers in both settings. ctDNA positivity was associated with significantly worse event-free survival compared with ctDNA-negative patients. Among the 14 patients with stage II to III disease who had ctDNA assessed in both the MRD window and surveillance window, nine patients consistently had a negative ctDNA or converted from positive to negative over time. In contrast, five patients demonstrated persistent ctDNA positivity, and all of these patients subsequently relapsed. Among the 38 patients who had both ctDNA and serum tumor marker tests during the MRD window, nine patients showed discordant biomarker results. Of these, 6 patients were ctDNA-negative but serum tumor marker-positive, and one of them experienced recurrence. Three patients were ctDNA-positive but serum tumor marker-negative, and one of these patients also recurred. During the surveillance window, 46 patients had both biomarkers available, and 10 showed discordant results. Three patients were ctDNA-negative but serum tumor marker-positive, and none of them recurred. In contrast, all seven patients who were ctDNA-positive but serum tumor marker-negative experienced recurrence. This intriguing data strongly support the potential role of ctDNA in patients with stage I, II, and III germ cell tumors. However, as the authors noted, the retrospective nature of the study presents limitations, as treatment approaches, imaging schedules, and the timing of testing were not standardized, and ctDNA testing varies among participating institutions. Larger prospective trials with standardized protocols and long-term follow-up will be essential to validate these findings and determine how ctDNA can be reliably integrated into clinical practice. Thank you for tuning in to JCO Precision Oncology Article Insights. Don't forget to subscribe and join us next time as we explore more groundbreaking research shaping the future of oncology. 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.

28 Jan

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7 min
7 JAN

Palbociclib in Tumors with CDKN2A Loss or Mutation

In this JCO Precision Oncology Article Insights episode, host Dr. Harold Nathan Tan summarizes "Palbociclib in Patients With Head and Neck Cancer and Other Tumors With CDKN2A Alterations: Results From the Targeted Agent and Profiling Utilization Registry Study" by Worden et al. TRANSCRIPT Harold Nathan Tan: Welcome to JCO Precision Oncology Article Insights, where we explore research that is reshaping our understanding of cancer therapeutics. I'm your host, Harold Nathan Tan, and today's episode centers on the TAPUR study, an analysis that confronts a long-standing assumption in molecular oncology: namely, whether CDKN2A alterations create a therapeutic vulnerability that can be exploited by CDK4/6 inhibition with palbociclib. CDKN2A is one of the most frequently altered tumor suppressors across solid tumors. Its importance lies in its production of two proteins, p16 and p14, which serve as guardians of cell cycle progression. p16 directly inhibits CDK4 and CDK6, preventing phosphorylation of the RB protein and therefore blocking entry into S phase, whereas p14 stabilizes p53 by counteracting MDM2, enabling cells to pause or die in response to oncogenic stress. When CDKN2A is lost or mutated, these dual checkpoints collapse. CDK4/6 activity becomes unchecked, RB remains phosphorylated and inactive, and p53-mediated surveillance is blunted from a mechanistic standpoint. This creates a possible dependency on CDK4/6 signaling that could, in principle, be therapeutically reversed by palbociclib. The TAPUR study is a prospective phase 2 basket study designed to evaluate whether FDA-approved targeted agents can meaningfully benefit patients with advanced treatment-refractory cancers harboring specific genomic alterations. In this analysis, patients were eligible for palbociclib if their tumors carried CDKN2A loss or mutation and retained RB activity. Two cohorts were examined: one consisting of head and neck cancers, and another composed of a broad spectrum of tumor types that collectively shared the CDK2 alteration. The results from the head and neck cancer cohort are particularly intriguing. Among the 28 available patients, the study observed a disease control rate of 40%, surpassing the predefined threshold for a positive signal. Although the objective response rate was low at only 4% with one partial response, the durability of disease stabilization was clinically meaningful. However, the most important insight comes from examining which head and neck tumors benefited. The strongest and most durable disease control occurred in non-squamous malignancies, particularly salivary gland tumors such as adenocarcinoma, adenoid cystic carcinoma, and poorly differentiated parotid tumors, as well as in esthesioneuroblastoma. In contrast, classic head and neck squamous cell carcinoma rarely demonstrated sustained benefit. When progression-free survival was analyzed, non-squamous tumors achieved a median PFS of approximately 20 weeks compared to just eight weeks in squamous tumors. This divergence reflects deep biological differences. Many non-squamous head and neck cancers preserve an intact RB axis and rely on CDK4/6-driven cell cycle control as a core proliferative mechanism. By contrast, squamous tumors tend to accumulate a dense array of co-alterations that weaken or circumvent CDK4/6 dependency. Many squamous tumors also harbor disruptive TP53 mutations, removing essential checkpoint control and allowing the cell to bypass the growth-arresting effects of palbociclib. In other words, even though CDKN2A loss is present, CDK4/6 is no longer the dominant node controlling proliferation in these cancers, and the tumor simply finds other ways to drive cell cycle entry. One of the most thought-provoking findings from the TAPUR study involves esthesioneuroblastoma. Three patients with this rare tumor achieved durable disease control despite the lack of standardized systemic treatment options for this malignancy. Genomic analyses have shown that while esthesioneuroblastoma often carries TP53 or IDH2 mutations, a meaningful subset exhibits alterations in CDKN2A or related cell cycle regulators. The consistency of this disease stabilization observed in TAPUR may reflect a lineage-specific reliance on CDK4/6 signaling, opening the door for future exploration of CDK4/6 inhibitors in this orphan disease. In the histology-pooled cohort, which included 40 available patients across 18 tumor types, palbociclib did not achieve the disease control threshold required to declare activity, with only a disease control rate of 13% and an ORR of 5%. While a few isolated responses occurred, for instance in thymic carcinoma and B-cell lymphoma, the overall disease control rate was 13%, which failed to rise above what might be expected from the natural history of advanced refractory cancers. This outcome reinforces the principle that CDKN2A loss is not a universal predictor of CDK4/6 dependency. Many of the tumors represented in this cohort, such as pancreatic cancer, melanoma, and gastrointestinal malignancies, are well known to evolve multiple compensatory mechanisms that circumvent CDK4/6 as a critical proliferative node. The safety profile of palbociclib was consistent with its known hematologic toxicities. High rates of neutropenia, leukopenia, and thrombocytopenia were observed, along with one treatment-related death due to respiratory failure. In a setting where activity is limited to specific subgroups, these toxicities underscore the importance of careful patient selection and raise the bar for demonstrating clinically meaningful benefit, particularly in heavily pretreated populations. So what do these findings tell us about the broader landscape of precision oncology? First, they remind us that a mutation's functional role is dependent on the cellular and lineage context in which it occurs. CDKN2A loss may accelerate proliferation in many tumors, but the mechanism of that acceleration varies widely, and the degree to which a tumor relies on CDK4/6 signaling is anything but uniform. Second, the findings suggest that palbociclib monotherapy may hold meaningful and durable benefit in the subset of non-squamous head and neck cancers, particularly salivary gland malignancies and esthesioneuroblastoma. Third and perhaps most importantly, the results reinforce a growing consensus that the future of CDK4/6 inhibition in solid tumors lies not in monotherapy, but in rational combination strategies. CDK4/6 inhibitors have been shown to synergize with EGFR inhibitors, PIK3CA, and mTOR inhibitors, MEK inhibition, and even immune checkpoint blockade. These combinations aim to dismantle the compensatory pathways that allow tumors to escape CDK4/6 blockade and may unlock therapeutic potential in tumors that show limited sensitivity to monotherapy. Ultimately, the TAPUR findings challenge the notion that CDKN2A is a straightforward predictive biomarker. Instead, the study reveals CDKN2A as a biomarker whose meaning is modulated by tumor lineage, co-mutation status, and the broader regulatory circuit governing proliferation. Precision oncology must therefore move beyond single-gene interpretation towards integrated frameworks that situate genomic alterations within their biologic ecosystems. In some head and neck cancer subtypes, particularly non-squamous malignancies, that ecosystem appears amenable to CDK4/6 inhibition, and that insight, not the simplistic gene-to-drug match, represents the true value of the TAPUR analysis. Thank you for joining me for this episode of JCO Precision Oncology Article Insights. I'm Harold Nathan Tan, and I look forward to exploring more research that continues to refine how we understand and strategically exploit the vulnerabilities of cancer. 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.

7 Jan

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9 min
21/08/2025

The Gut Microbiome and Immunotherapy: Researching the Connection

Dr. Sumanta (Monty) Pal and Dr. Arielle Elkrief discuss the clinical relevance of the gut microbiome in cancer immunotherapy and the importance of antibiotic stewardship, as well as interventions currently being explored to treat gut dysbiosis and optimize immunotherapy response. TRANSCRIPT Dr. Sumanta (Monty) Pal: Hi everyone, I'm Dr. Monty Pal, welcoming you to the ASCO Daily News Podcast. I'm a medical oncologist. I'm a professor and vice chair of academic affairs at the City of Hope Comprehensive Cancer Center in Los Angeles. Today we're here to discuss one of my favorite topics, which is the gut microbiome. It's almost hard to avoid the gut microbiome nowadays if you look at medical literature within oncology. It's an emerging phenomenon, but there are a couple of individuals that I would really define as pioneers in the field. And one of them is actually with me today, Dr. Arielle Elkrief, to discuss the clinical relevance of the gut microbiome, particularly amongst patients receiving immunotherapy, although I imagine our conversation today will take many twists and turns. Arielle is an assistant professor and clinician scientist in the Department of Oncology at the University of Montreal, and she is co-director of the CHUM Microbiome Center there. FYI for the listeners, we have our full disclosures in the transcript of this episode. Arielle, thank you so much for joining us today. Dr. Arielle Elkrief: Thanks so much, Monty. This is going to be amazing. Dr. Sumanta (Monty) Pal: Well, I have to tell you what sort of inspired me to bring you on as a guest. It was one of many things, but it was this really terrific ASCO Educational [Book] article that you wrote. Now, I have to tell you, I've read all the articles sort of cover to cover in the book, and they're always a wonderful primer, so if our audience is studying for board research or something of that sort, it's a terrific resource to go through. I have to tell you, this piece on the gut microbiome that you wrote is nothing short of a masterpiece. If you read this cover to cover, it's actually going to give you, I think, a sense of the current state and future state of the field. I wanted to start by just sort of beginning with sort of the origin story for a lot of this, which is this association between the gut microbiome and immunotherapy response. This takes us back several years to this pivotal series of papers in Science. Maybe you could walk our audience through that. Dr. Arielle Elkrief: Absolutely. Well, thank you so much for your kind words about the ASCO [Educational] Book. It was a team effort with a lot of key opinion leaders in the field, so I'm really glad to learn that you've liked it. Moving backwards in terms of how we came to understand that the gut microbiome is essential to priming a response to cancer immunotherapy actually goes back to 2015 and seminal papers that looked at what happens when we take mice that are germ-free mice that have never been exposed to a microbiome. These are mice that are born by cesarean section and essentially live in a bubble. And when we give those mice tumors and treat them, in the first papers with anti-CTLA-4 treatment, we realized that these antibodies don't work at all. And that was the first observation that the presence of a gut microbiome was essential to mounting an anti-cancer immune response. When we supplemented those same mice with beneficial bacteria or feces from responder patients, we were able to restore the response to immunotherapy. And so those were really the first preclinical observations that made us understand the critical role of the microbiome in immunotherapy response. Moving a little bit in the future, we examined the fecal microbiome composition using shotgun metagenomic sequencing in different cohorts of patients with solid tumors, namely lung cancers, kidney cancers, and also skin tumors like melanoma, and found that patients who responded to immunotherapy had a distinct microbiome that was characterized by beneficial bacteria compared to patients who experienced resistance to immunotherapy that had a dysbiotic or diseased microbiome. Dr. Sumanta (Monty) Pal: So, you know, it's interesting, these techniques that we're using to sequence the gut, they're a little bit different. So I wonder if you can give the audience a quick primer on these techniques that you're so well versed in, shotgun metagenomic sequencing, 16S rRNA sequencing. If you had to describe this in 30 seconds, which is a tall task, how would you do that? Dr. Arielle Elkrief: That's a tall task. Much of what we know about the microbiome initially came from a technique called 16S rRNA sequencing. This is a technique that amplifies the 16S region and basically tells you at the genus level what's going on at the level of bacterial composition. This technique is fast, relatively cheap, and can be performed on a laptop computer, which is excellent. The problem is that it's prone to a lot of technical variations. Different primers might give you different results, and you're really limited at the genus resolution. You can't get a good resolution in terms of species, and we're learning that different species from the same genus might have different physiological properties, and the same thing goes at the strain level. So when we really zone in and look at inter-species changes, we're seeing that these actually have specific functions in the host. So that brings us to metagenomic sequencing, which is a whole genome sequencing, next-generation sequencing based method that looks at the whole composition and gives you information not only on bacteria, but you might also get fungal and viral properties. You can zoom in on the strain level. You can also get functional output, so we can examine what the metabolic properties of specific species or strains might look like. The negative aspects of shotgun metagenomic sequencing is that it takes a lot of computational power in order to analyze the results and it might take a little bit longer. And certainly, within the clinical setting, not something that's feasible yet. And that brings us to more novel point-of-care biomarker tools that we've collaborated in developing along with Dr. Laurence Zitvogel and Dr. Lisa Derosa at Gustave Roussy, that learning from the shotgun metagenomics results designed a probe using quantitative PCR which looks for this specific bacteria we know to be important and developed a ratio of harmful bacteria to beneficial bacteria. This is called the TOPOSCORE, and it actually is able to predict quite nicely the response to immunotherapy using a stool sample and a really good turnaround time of almost 72 hours. Dr. Sumanta (Monty) Pal: That was a perfect overview and a lot of information in a short amount of time. It also makes you take out your high school biology textbooks, doesn't it, to understand that the bacterial ribosome, right, is a different size and shape, and that's what we're sequencing here. But these techniques I think are incredibly important, and I'm glad you actually discussed this, this RT-PCR based strategy of calculating the TOPOSCORE. It lends itself to this phenomenon of dysbiosis, and I think for our audience, that's going to be an important term to understand as time goes on. There's the normal healthy gut and then there's this phenomenon of dysbiosis, which is, I guess, simply put, an unhealthy gut. But tell us about, you know, how often you see dysbiosis in a cancer patient, maybe versus a normal healthy adult. Dr. Arielle Elkrief: So, I think we can split up your question into two parts. One is we know from cohort studies and population level-based studies that the microbiome of patients with cancer is distinct from healthy patients or healthy people. And we know that because of the global composition. We also think that there are diversity metrics that lend themselves to being described as dysbiotic. But we do know that the microbiome of people with cancer is distinct from healthy volunteers. That's the first point. In terms of how frequently dysbiosis occurs in patients with cancer, it's not very well defined. We know that even among healthy people, there is a certain level of dysbiosis. Laurence in her talk mentioned that to be about 10% to 20%. And the other fascinating component is that when we're thinking about dysbiosis and the cancer associated microbiome, in terms of the species that are enriched, it's quite striking that a lot of these dysbiotic or negative bacteria are also found to be enriched in patients with metabolic disease, like cardiovascular disease, for example. And so it's unclear if dysbiosis is the cause or consequence, but there definitely seems to be a general pattern of disease when looking at the microbiome compared to healthy people. Dr. Sumanta (Monty) Pal: That's interesting. So, I'll tell you, my second favorite portion of your article, and I'll tell you my favorite portion as well in the context of this podcast, but my second favorite part was the section around antibiotic stewardship. You know, the utilization of antibiotics in a very pragmatic fashion amongst our patients. Can you describe why that's so critical in the context of the microbiome? Dr. Arielle Elkrief: Antibiotics can disrupt the gut microbiome composition. We know this from mouse studies, but also cohort studies of patients that are exposed to antibiotics. And most importantly, we know that patients who are exposed to antibiotics, either before or during the immunotherapy period, have significantly worse progression-free survival and overall survival to immunotherapy. And this is true for immunotherapy in the monotherapy setting, but also when combined with chemotherapy. What's striking is that when we look at patients who are just treated with chemotherapy, we don't see the negative outcome of antibiotics on outcome and progression-free survival and overall survival, suggesting that th

21/08/2025

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19 min
13/02/2024

The Heritability of Cancer: The Impact of Parental Cancer on Children

Listen to ASCO's Journal of Clinical Oncology essay, "The Heritability of Cancer" by Dr. Leeat Granek, Associate Professor at York University in Toronto, Canada. The essay is followed by an interview with Granek and host Dr. Lidia Schapira. Granek shares how her mother's diagnose with breast cancer continues to shape her own life and experiences. TRANSCRIPT Narrator: The Heritability of Cancer, by Leeat Granek I was 9 years old when my mother was first diagnosed with breast cancer and 25 when she died. The boundary between before and after is so clear that it feels like I have lived two lives. I went from being a careless, cerebral, quirky child to a rough version of the responsible, reliable, and vigilant adult I would eventually became. With cancer came the fear of losing my mother, and with that fear came an unwelcome but necessary maturity. There were other important life events impacting our family around that time that contributed to this sense of split. We had just moved from Israel to Toronto and knew few people in our new environment. My mother had just given birth to my baby brother, and my parents had bought a new house for our growing family. At the time, I was starting third grade in a new school—the fifth new school since beginning kindergarten. All this in addition to the diagnosis. My mother was only 33 years old—the same age I am now. While I adapted to everything else—new house, new school, new brother, new country—cancer insisted on sticking around, and it claimed not only my mother's life but, in many ways, my own. Cancer enters the body of the caregivers in ways that move far beyond the domestic work involved in the running of the house or the management of medications and appointments. It can become part of caregiver DNA through inherited genes, but it often does so in more insidious ways. My mother lived with the disease for 17 years before she died in 2005. It is fair to say I grew up in the hospital. Over the years, there were multiple surgeries, along with episodes of weekly chemotherapy and daily radiation sessions. She suffered a host of complications that came with metastatic disease and its treatment, including four instances of strep A bacteremia. Many major events happened in the hospital. We ate Chinese food with our matzos on Passover in her room and lit Hanukkah candles in the waiting room where we accidentally set off the fire alarm on the seventh night, to the consternation of the nursing staff. My 11th, 15th, 18th, and 25th birthdays were celebrated in cramped hospital quarters, cutting the birthday cake with a dull plastic knife. Indeed, the last birthday we had together was my 25th, and we marked it in the hospital 2 days before she died. In her last lucid moment, she managed to miraculously lift out of the fog caused by brain metastases to give me a kiss and exclaim "Mazal tov, Leeatie!" I remember the sounds and the smells. Static codes being called out over the hospital loudspeakers. The haunting "clink, clink, clink" of the staples being removed from my mother's skin graft and landing with a loud clatter in a silver bowl. The pale green hallways and their antiseptic smell, which I grew to hate. The airless temperature that was neither hot nor cold—hospital weather, I used to call it. The hospital, with its sounds and smells, was my second home. It sounds awful. And it was a lot of the time, but there were many good moments as well. My mother was smart, intuitive, funny, and astonishingly optimistic. She was always laughing and incredibly giving with her love and affection. We were exceptionally close. Her eyes lit up and her arms stretched out to give me a hug every single time I walked into her room. She would say things like, "Leeatie, I love you so much. I wouldn't change a single thing about you! How did I get to be so lucky to have a daughter like you?" and "There's no one in the world I would rather spend time with than you." I didn't have to do anything to earn her affection. I felt that I always came first, that I was always wanted and loved, and that my mother was always entirely there for me in every sense of the word. The hospital days that punctuated much of my childhood, adolescence, and young adulthood were both an annoyance and a blessing. There was nothing else to do but simply be together, which was fun and easy, thankfully. When I was older and no longer living at home, I would sometimes sleep over in her hospital room during her admissions. We would curl up in the twin bed and talk for hours until we both fell asleep, or we would sit together, each absorbed in her own book, comforted by the warmness of being together. When I think about being a caregiver for my mom, and by extension a caregiver for our family, it was not the hours of care work—the babysitting, driving to appointments, spending time in the hospital—that consumed me. The impact was long-lasting and continues to this day. As a health psychologist and a researcher in the area of psychooncology, I know the permanent and long-term devastations cancer causes throughout the caregiver's—in my case, the daughter's—entire life span. To this day, I have no real sense of what normal physical development for a woman should feel and look like, and in some sense, I never will. I entered puberty around the same time my mother was having her breasts and ovaries removed, which made that phase frightening and emotionally difficult. And now, I have no mother to turn to and ask about my endlessly evolving female form, no mother to guide me through future pregnancies or talk me through gray hair and menopause. Cancer shaped my young adulthood and my emotional development. At 20 years old, I was dealing with issues facing 60-year-olds who care for ill and aging parents. Because part of me recognized that time was running out—indeed, because I lived almost my entire life with a neon awareness of my mother's mortality—I was tethered to home and making decisions about school, life, and love that would keep me close to her. I don't regret these choices or a single moment that I chose to spend with her, and now I have an entire lifetime to come and go as I please. Being challenged with a cancer-driven perspective at 20, however, carries risks of having an entire lifetime being developmentally out of step with one's peers and unprepared for life events outside a hospital. For example, at 25, I could look death in the face without trembling and without abandoning my mother at her end, but I was unprepared to face the dating world that most young adults would have no trouble navigating. Although I was and remain a loved, nurtured, and supported daughter, cancer diverted the vast majority of the temporal, emotional, financial, and physical resources in our family toward fighting the disease. When she was alive, my mother was fully present in my life. But even her unconditional love could not repair the reality of my out-of-sync development as a child and young adult or today make up for her continued absence in my life. My absent mother is at the core of a black hole of grief that remains inside of me and that has been painfully pried open with subsequent losses to cancer—my grandmother and my aunt, a professor I admired and family friend that I loved. Each loss re-exposes a haunting grief I have learned to accept and live with. Grief is a shadow that looms large in my life. It is both the topic I chose to study and the affect I advocate fiercely for,1–4 because as I have learned through my own experiences and research, love and light come from the same place as grief and darkness. The ability to grieve our losses fully also allows us to love and appreciate the people in our lives when they are still with us. And then, of course, there is the worry: the biannual check-ups, magnetic resonance imaging scans, and mammograms; the surveillance and the false positives and the constant paradoxical tension that comes with the awareness of the nature of these tests provide a false sense of control over a disease that refuses to be harnessed. The literature about the impact of parental cancer on children at the time of diagnosis, during treatment, after surgery, and even at the time of death is extensive,5–6 but few of these studies acknowledge how much this disease alters the life course of the child well after the parent has recovered or has died. Being a caregiver for a patient with cancer consumed much of my childhood, adolescence, and young adulthood when my mother was alive and charted the course for my future as a health psychologist working in the field of psychooncology. Although many years have passed and although I have a doctorate in hand, several years of postdoctoral training in the field of psychooncology, an academic career studying these issues, and dozens of publications from my research on the psychological and emotional effects of cancer on patients, caregivers, and their families,7–16 from time to time, I still feel like a scared 9-year-old child trying to gain control over this disease and get out of the shadow that cancer has cast on my life. Dr. Lidia Schapira: Hello, and welcome to JCO's Cancer Stories, the Art of Oncology, which features essays and personal reflections from authors exploring their experience in the field of oncology. I'm your host, Dr. Lidia Schapira. I'm a Professor of Medicine at Stanford University. Today we are joined by Dr. Leeat Granek, Associate Professor at York University in Toronto, Canada, in the School of Social Policy and Health Management. In this episode, we will be talking about her Art of Oncology article, "The Heritability of Cancer." At the time of this recording, our guest has no disclosures. Leeat, welcome to our podcast and thank you for joining us. Dr. Leeat Granek: Thank you so much for having me. It's a pleasure. Dr. Lidia Schapira: Your essay is a classic, and I'm so glad that we were able to i

13/02/2024

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28 min
26 JAN

Highlights From the 2026 ASCO GI Cancers Symposium

Dr. Monty Pal and Dr. Mary Feng discuss the latest advances in metastatic colorectal, gastric, and gastroesophageal cancers that were presented at the 2026 ASCO Gastrointestinal Cancers Symposium.

26 Jan

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20 min
17/12/2025

FGFR3 Alteration Status and Immunotherapy in Urothelial Cancer

JCO PO author Dr. Shilpa Gupta at Cleveland Clinic Children's Hospital shares insights into her article, "Fibroblast Growth Factor Receptor 3 (FGFR3) Alteration Status and Outcomes on Immune Checkpoint Inhibitors (ICPI) in Patients with Metastatic Urothelial Carcinoma". Host Dr. Rafeh Naqash and Dr. Gupta discuss how FGFR3 combined with TMB emerged as a biomarker that may be predictive for response to ICPI in mUC. TRANSCRIPT Dr. Rafeh Naqash: Hello and welcome to JCO Precision Oncology Conversations, where we bring you engaging conversations with authors of clinically relevant and highly significant JCO PO articles. I'm your host, Dr. Rafeh Naqash, podcast editor for JCO Precision Oncology and Associate Professor at the OU Health Stephenson Cancer Center. Today I am excited to be joined by Dr. Shilpa Gupta, Director of Genitourinary Medical Oncology at the Cancer Institute and co-leader of the GU Oncology Program at the Cleveland Clinic, and also lead author of the JCO PO article titled "Fibroblast Growth Factor Receptor 3 Alteration Status and Outcomes on Immune Checkpoint Inhibitors in Patients With Metastatic Urothelial Carcinoma." At the time of this recording, our guest's disclosures will be linked in the transcript. Shilpa, welcome again to the podcast. Thank you for joining us today. Dr. Shilpa Gupta: Thank you, Rafeh. Honor to be here with you again. Dr. Rafeh Naqash: It is nice to connect with you again after two years, approximately. I think we were in our infancy of our JCO PO podcast when we had you first time, and it has been an interesting journey since then. Dr. Shilpa Gupta: Absolutely. Dr. Rafeh Naqash: Well, excited to talk to you about this article that you published. Wanted to first understand what is the genomic landscape of urothelial cancer in general, and why should we be interested in FGFR3 alterations specifically? Dr. Shilpa Gupta: Bladder cancer or urothelial cancer is a very heterogeneous cancer. And while we find there is a lot of mutations can be there, you know, like BRCA1, 2, in HER2, in FGFR, we never really understood what is driving the cancer. Like a lot of old studies with targeted therapies did not really work. For example, we think VEGF can be upregulated, but VEGF inhibitors have not really shown definite promise so far. Now, FGFR3 receptor is the only therapeutic target so far that has an FDA approved therapy for treating metastatic urothelial cancer patients, and erdafitinib was approved in 2019 for patients whose tumors overexpressed FGFR3 mutations, alterations, or fusions. And in the landscape of bladder cancer, it is important because in patients with non-muscle invasive bladder cancer, about 70 to 80% patients can have this FGFR3. But as patients become metastatic, the alterations are seen in, you know, only about 10% of patients. So the clinical trials that got the erdafitinib approved actually used archival tumor from local cancer. So when in the real world, we don't see a lot of patients if we are trying to do metastatic lesion biopsies. And why it is important to know this is because that is the only targeted therapy available for our patients right now. Dr. Rafeh Naqash: Thank you for giving us that overview. Now, on the clinical side, there is obviously some interesting data for FGFR3 on the mutation side and the fusion side. In your clinical practice, do you tend to approach these patients differently when you have a mutation versus when you have a fusion? Dr. Shilpa Gupta: We can use the treatment regardless of that. Dr. Rafeh Naqash: I recently remember I had a patient with lung cancer, squamous lung cancer, who also had a synchronous bladder mass. And the first thought from multiple colleagues was that this is metastatic lung. And interestingly, the liquid biopsy ended up showing an FGFR3-TACC fusion, which we generally don't see in squamous lung cancers. And then eventually, I was able to convince our GU colleagues, urologists, to get a biopsy. They did a transurethral resection of this tumor, ended up being primary urothelial and synchronous lung, which again, going back to the FGFR3 story, I saw in your paper there is a mention of FGFR3-TACC fusions. Anything interesting that you find with these fusions as far as biology or tumor behavior is concerned? Dr. Shilpa Gupta: We found in our paper of all the patients that were sequenced that 20% had the pathognomonic FGFR3 alteration, and the most common were the S249C, and the FGFR3-TACC3 fusion was in 45 patients. And basically I will say that we didn't want to generate too much as to fusion or the differences in that. The key aspect of this paper was that historically there were these anecdotal reports saying that patients who have FGFR alterations or mutations, they may not respond well to checkpoint inhibitors because they have the luminal subtype. And these were backed by some preclinical data and small anecdotal reports. But since then, we have seen that, and that's why a lot of people would say that if somebody's tumor has FGFR3, don't give them immunotherapy, give them erdafitinib first, right? So then we had this Phase 3 trial called the THOR trial, which actually showed that giving erdafitinib before pembrolizumab was not better. That debunked that myth, and we are actually reiterating that because in our work we found that patients who had FGFR3 alterations or fusions, and if they also have TMB-high, they actually respond very well to single agent immunotherapy. And that is, I think, very important because it tells us that we are not really seeing that so-called potential of resistance to immunotherapy in these patients. So to answer your question, yeah, we did see those differences, but I wouldn't say that any one marker is more prominent. Dr. Rafeh Naqash: The analogy is kind of similar to what we see in lung cancer with these mutations called STK11/KEAP1, which are also present in some other tumors. And one of the questions that I don't think has been answered is when you have in lung cancer, if you extrapolate this, where doublet or single agent immunotherapy doesn't do as well in tumors that are STK11 mutated. But then if you have a high TMB, question is does that TMB supersede or trump the actual mutation? Could that be one reason why you see the TMB-high but FGFR3 altered tumors in your dataset responding or having better outcomes to immunotherapy where potentially there is just more neoantigens and that results in a more durable or perhaps better response to checkpoint therapy? Dr. Shilpa Gupta: It could be. But you know, the patients who have FGFR alterations are not that many, right? So we have already seen that just patients with TMB-high respond very well to immunotherapy. Our last podcast was actually on that, regardless of PD-L1 that was a better predictor of response to immunotherapy. So I think it's not clear if this is adding more chances of response or not, because either way they would respond. But what we didn't see, which was good, that if they had FGFR3, it's not really downplaying the fact that they have TMB-high and that patients are not responding to immunotherapy. So we saw that regardless, and that was very reassuring. Dr. Rafeh Naqash: So if tomorrow in your clinic you had an individual with an FGFR3 alteration but TMB-high, I guess one could be comfortable just going ahead with immunotherapy, which is what the THOR trial as you mentioned. Dr. Shilpa Gupta: Yes, absolutely. And you know, when you look at the toxicity profiles of pembrolizumab and erdafitinib, really patients really struggle with using the FGFR3 inhibitors. And of course, if they have to use it, we have to, and we reserve it for patients. But it's not an easy drug to tolerate. Currently the landscape is such that, you know, frontline therapy has now evolved with an ADC and immunotherapy combinations. So really if patients progress and have FGFR3 alterations, we are using erdafitinib. But let's say if there were a situation where a patient has had chemotherapy, no immunotherapy, and they have FGFR3 upregulation and TMB-high, yes, I would be comfortable with using only pembrolizumab. And that really ties well together what we saw in the THOR trial as well. Dr. Rafeh Naqash: Going to the clinical applications, you mentioned a little bit of this in the manuscript, is combination therapies. You alluded to it a second back. Everything tends to get combined with checkpoint therapy these days, as you've seen with the frontline urothelial, pembrolizumab with an ADC. What is the landscape like as far as some of these FGFR alterations are concerned? Is it reasonable to combine some of those drugs with immune checkpoint therapy? And what are some of the toxicity patterns that you've potentially seen in your experience? Dr. Shilpa Gupta: So there was indeed a trial called the NORSE trial. It was a randomized trial but not a comparative cohort, where they looked at FGFR altered patients. And when they combined erdafitinib plus cetrelimab, that did numerically the response rates were much higher than those who got just erdafitinib. So yeah, the combination is definitely doable. There is no overlapping toxicities. But unfortunately that combination has not really moved forward to a Phase 3 trial because it's so challenging to enroll patients with such kind of rare mutations on large trials, especially to do registration trials. And since then the frontline therapy has evolved to enfortumab vedotin and pembrolizumab. I know there is an early phase trial looking at a next generation FGFR inhibitor. There is a triplet combination looking in Phase 1 setting with a next generation FGFR inhibitor with EV-pembro. However, it's not a randomized trial. So you know, I worry about such kinds of combinations where we don't have a path for registration. And in the four patients that have been treated, four or five patients in the early phase as a part of basket

17/12/2025

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19 min
04/12/2025

What Challenges Will Oncologists Face in 2026?

Dr. Monty Pal and Dr. Jason Westin discuss the federal funding climate for cancer research and the persistent problem of drug shortages, two of the major concerns facing the oncology community in 2026. TRANSCRIPT Dr. Monty Pal: Hello and welcome to the ASCO Daily News Podcast. I am your host, Dr. Monty Pal. I am a medical oncologist and vice chair of academic affairs at the City of Hope Comprehensive Cancer Center in Los Angeles. There are always multiple challenges facing oncologists, and today, we discuss two of them that really stand out for 2026: threats to federal funding for cancer research and the persistent problem of drug shortages. I am thrilled to welcome Dr. Jason Westin, who believes that one way to meet these challenges is to get oncologists more involved in advocacy, and he will share some strategies to help us meet this moment in oncology. Dr. Westin is a professor in the Department of Lymphoma and Myeloma at the University of Texas MD Anderson Cancer Center, but he actually wears a lot of hats within ASCO. He is a member of the Board of Directors and has also previously served as chair of ASCO's Government Relations Committee. And he is also one of the inaugural members of ASCO's Political Action Committee, or PAC. He has testified before Congress about drug shortages and many other issues. Dr. Westin, I am really excited to have you on the podcast today and dive into some of these elements that will really impact our community in 2026. Thanks so much for joining us today. Dr. Jason Westin: Thank you for having me. Dr. Monty Pal: You've had such a range of experience. I already alluded to you testifying before Congress. You've actually run for office before. You wear so many different hats. I'm used to checking my PubMed every other day and seeing a new paper out from you and your group, and you publish in the New England Journal [of Medicine] on practice-setting standards and the diseases that you treat. But you've also done all this work in the domain of advocacy. I can't imagine that balancing that is easy. What has sort of motivated you on the advocacy front? Dr. Jason Westin: Advocacy to me is another way to apply our skills and help more people than just those that you're sitting across from at the time. Clinical research, of course, is a tool to try and take what we know and apply it more broadly to people that you'll never meet. And advocacy, I think, can do the same thing, where you can have a conversation with a lawmaker, you can advocate for a position, and that hopefully will help thousands or maybe even more people down the road who you'd never get to directly interact with. And so, I think it's a force multiplier in the same way that research can be. And so, I think advocacy is a wonderful part of how doctors care for our patients. And it's something that is often difficult to know where to start, but once people get into advocacy, they can see that the power, the rewarding nature of it is attractive, and most people, once they get going, continue with that through the rest of their career. Dr. Monty Pal: So, I'll ask you to expand on that a little bit. We have a lot of our younger ASCO members listening to this podcast, folks that are just starting out their careers in clinical practice or academia. Where does that journey begin? How do you get to the point that you're testifying in front of Congress and taking on these bigger sort of stances for the oncology community? Dr. Jason Westin: Yeah, with anything in medicine and in our careers, you have to start somewhere. And often you start with baby steps before you get in front of a panel of senators or other high-profile engagement opportunities. But often the first setting for junior colleagues to be engaged is doing things – we call them "Hill Days" – but basically being involved in kind of low-stakes meetings where you're with a group of peers, some of whom have done this multiple times before, and can get engaged talking to members of representatives' offices, and doing so in a way where it's a natural conversation that you're telling a story about a patient in your clinic, or that you're telling a personal experience from a policy that impacted your ability to deliver optimal care. It sounds stressful, but once you're doing it, it's not stressful. It's actually kind of fun. And it's a way that you can get comfort and skill with a group of peers who are there and able to help you. And ASCO has a number of ways to do that, both at the federal level, there's the Hill Day where we each April have several hundred ASCO members travel to Capitol Hill. There's also state engagement that can be done, so-called visiting at home, when representatives from the U.S. Congress or from state legislators are back in district. You can meet with your own representatives on behalf of yourself, on behalf of your organization, and advocate for policies in a way that can be beneficial to your patients. But those initial meetings that are in the office often they're low stakes because you could be meeting not with the representative but with their staff. And that staff sometimes is as young or even younger than our junior colleagues. These sometimes can be people in their 20s, but they're often extremely knowledgeable, extremely approachable, and are used to dealing with people who are new to advocacy. But they actually help make decisions within the office. So it's not a waste of time. It's actually a super useful way to engage. So, it's that first step of anything in life. The activation energy is always high to do something new. But I'd encourage people who are listening to this podcast already having some level of interest about it to explore ways that they could engage more. Dr. Monty Pal: You know, I have to tell you, I'm going to riff on what you just said for a second. ASCO couldn't make it any easier, I think, for folks to participate and get involved. So, if you're listening to this and scratching your head and thinking, "Well, where do I begin? How do I actually sign on for that meeting with a local representative?" Go to the ASCO ACT Network website. And I'll actually talk to our producer, Geraldine, to make sure we've got a link to that somewhere associated with this podcast after it's published, Jason, but I actually keep that on my browser and it's super easy. I check in there every now and then and see if there's any new policy or legislation that ASCO, you know, is sort of taking a stance on, and it gives me some fodder for conversation with my local representatives too. I mean, it's just an awesome, awesome vehicle. I'm going to segue right from there right to the issues. So, you and I are both at academic centers. You know, I think this is something that really pervades academia and enters into implications for general clinical practice. There's been this, you know, massive sort of proposal for decreased funding to the NCI and to the NIH and so forth. Tell us what ASCO is doing in that regard, and tell us perhaps how our community can help. Dr. Jason Westin: We live in interesting times, and I think that may be an understatement x 100. But obviously investments in research are things that when you're at an academic center, you see and feel that as part of your daily life. Members of Congress need to be reminded of that because there's a lot of other competing interests out there besides investing in the future through research. And being an elected representative is a hard job. That is something where you have to make difficult choices to support this, and that may mean not supporting that. And there's lots of good things where our tax dollars could be spent. And so, I'm sympathetic to the idea that there's not unlimited resources. However, ASCO has done an excellent job, and ASCO members have led the charge on this, of stating what research does, what is the benefit of research, and therefore why should this matter to elected representatives, to their staff, and to those people that they're elected to serve. And ASCO has led with a targeted campaign to basically have that message be conveyed at every opportunity to elected representatives. And each year on Hill Day, one of the asks that we have is to continue to support research: the NCI, NIH, ARPA-H, these are things that are always in the asks to make sure that there's appropriate funding. But effectively playing offense by saying, "It's not just a number on a sheet of paper, this is what it means to patients. This is what it means to potentially your loved ones in the future if you are in the opposite situation where you're not on the legislative side, but you're in the office receiving a diagnosis or receiving a difficult piece of news." We only have the tools we have now because of research, and each breakthrough has been years in the making and countless hours spent funded through the engine of innovation: clinical research and translational research. And so ASCO continues to beat that drum. You mentioned earlier the ACT Network. Just to bring that back again is a very useful, very easy tool to communicate to your elected representatives. When you sign up on the ASCO ACT website, you get emails periodically, not too much, but periodically get emails of, "This is a way you can engage with your lawmakers to speak up for this." And as you said, Monty, they make it as easy as possible. You click the button, you type in your address so that it figures out who your elected representatives are, and then it will send a letter on your behalf after like five clicks to say, "I want you to support research. I want you to vote for this particular thing which is of interest to ASCO and by definition to members of ASCO." And so the ACT Network is a way that people listening can engage without having to spend hours and significant time, but just a few clicks can send that letter to a representative in Congress. And the question could be: does that matt

04/12/2025

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22 min
06/11/2025

Managing Immune-Related Toxicities in Oncology

Dr. Monty Pal and Dr. Pauline Funchain discuss the latest efforts to diagnose, prevent, and treat the series of immune-related adverse events that have emerged in the era of immunotherapy. TRANSCRIPT Dr. Monty Pal: Hello, and welcome to the ASCO Daily News Podcast. I am Monty Pal, a medical oncologist, professor and vice chair of medical oncology at the City of Hope Comprehensive Cancer Center in Los Angeles, California. Now, it is probably no surprise to this audience that immunotherapy has transformed the treatment landscape for multiple cancer types. It remains a pillar of modern oncology. Having said that, I think we have all been baffled by certain toxicities that we run into in the clinic. Today, I am delighted to be joined by Dr Pauline Funchain to discuss some of the checkpoint inhibitor toxicities that people struggle with most. And we will also touch on some side effects of immunotherapy beyond checkpoint inhibitors: CAR-T cells, bispecifics, so on and so forth. Dr Funchain is a dear friend, and she is an associate professor and associate director of cancer research training and education at the Stanford Cancer Institute. She is co-director of the Immunotherapy Toxicity Program and the Skin Cancer Genomics Program at Stanford, where she also serves as associate program director of hematology and oncology fellowship. Dr. Funchain is also the co-founder of ASPIRE, and we are going to talk about that a little bit today, the Alliance for the Support and Prevention of Immune-Related Events. FYI for listeners, if you are interested in our disclosures, they are available at the transcript of this episode. Pauline, thanks so much for joining us today. Dr. Pauline Funchain: Monty, thank you for this invitation. It is always great to talk. Dr. Monty Pal: So, for the audience, Pauline and I know each other from my days as a fellow at City of Hope. She was a resident at Harbor UCLA and a stellar resident at that. It has just been amazing to sort of see your career grow and blossom and to witness all the cool things that you are doing. ASPIRE, in particular, sort of caught my eye. So again, for listeners, this is the Alliance for the Support and Prevention of Immune-Related Events. Can you tell us a little bit briefly about the genesis of that, how that came about? Dr. Pauline Funchain: So, there was a bunch of us who were really struggling, I mean, all of us have struggled with these immune-related adverse events, these irAEs. You know, they are new disease states, and even though they look like autoimmune diseases, they tend to need a whole lot more steroid than autoimmune diseases do and they do not totally present in the same way. And in fact, you know, Triple-M, or Triple-M overlap syndrome, is a completely new irAE, a new immune state that we have never had before the advent of checkpoint inhibitor. And so a Triple-M, for those of you who are not as familiar, that is the constellation of myocarditis, myositis, and myasthenia gravis, something that never occurs as a natural autoimmune disease. So we were starting to realize that there were some major differences with these irAEs and autoimmune diseases. We could not treat them the right way. We really needed to learn more about them. And a bunch of us who had interest in this said, "Look, we really need to be all in one space to talk about what we are doing," because all of our treatments were our own little homegrown brews, and we needed to really get together and understand how to treat these things, how to diagnose them, and then learn more about them. So, Dr. Alexa Meara from Ohio State, Dr. Kerry Reynolds from Mass Gen, we put together this research consortium, brought together all of our irAE friends, got our best subspecialists together in a research consortium, which is now only about a year and a half old. And we made this research consortium, the Alliance for Support of Prevention of Immune-Related Events, and we reached out to ASCO, and ASCO was so kind to grant us a [Alliance for Support and Prevention of Immune-Related adverse Events (ASPIRE)] Community of Practice. So we met for the first time as a Community of Practice at the ASCO Annual Meeting just this past June and really got an ASCO community together to really think about how to again, diagnose, prevent, treat irAEs. Dr Monty Pal: This is interesting to me. The ASCO Community of Practice phenomenon is something that I was not super familiar with. Can you explain to our listenership what is the ASCO Community of Practice model? If you have particular interests, how do you sort of get one started? Dr Pauline Funchain: Yeah, so ASCO has an entire page on their Community of Practice. There are multiple Community of Practice groups or COPs. There are ones for Supportive Oncology and Survivorship. There is Women in Oncology. There is a group for International Medical Graduates. And there is about, I think 10 or 12 now that have a physical presence at ASCO but also a virtual presence on the ASCO Community of Practice site. So, if you were interested in any one of these, and you can see them on the ASCO Communities of Practice sites, you would ask to become a member. Once granted membership, then there is a whole webpage of postings and conversations that people can have. You can get email digests of conversations that happen on the website, and then you can anchor it with in-person participation at the Annual Meeting. Dr Monty Pal: That is awesome, and I can think of so many different foci within oncology that really sort of deserve a Community of Practice. This definitely being one of them. You know, it strikes me as being so interesting. I mean, the checkpoint inhibitors have been around for a while now. I think when you and I were in training, gosh, back then, these were just a little bit of a pipe dream, right? But having said that, I would probably say that more than half of my kidney cancer practice is either on checkpoint inhibitors, and the vast majority have been on one at some point in their past, right? With that in mind, you know, we have all treated a lot of patients with these drugs. Why is it that we still struggle to manage the toxicities? And just to take that one step further, what are some of the toxicities that, perhaps through ASPIRE or through your experience, people struggle with the most? Dr Pauline Funchain: So, I think we are still struggling with these because again, they are new disease states, right? This is what we all experienced with COVID, a brand-new virus and a brand-new syndrome. We now have 20-plus of these as irAEs. And what we have realized about them is the immune activation that happens with these is so much more than what we have seen with autoimmune diseases. So for instance, if you have a Crohn's or ulcerative colitis, you will top out at 40 to 60 milligrams of prednisone if a Crohn's flare or ulcerative colitis flare happens. But for our severe IR colitises, you know, it is at least 1 mg per kg, often goes up to 2 mg per kg. We, in some cases, have done 1 gram pulses if we are worried that somebody is going to perforate. So that was sort of like the first 5 years of treating irAE, and then now in the sort of second 5 years of treating irAE, we have realized that that is a lot of immunosuppression, and we might be able to get away with less with the newer biologics that are on board. So, we are struggling to try to get the data for some of these irAEs that we knew, we have known for a while, but to try to get newer treatments that may immunosuppress less so that you may still be able to retain that tumor response. And in fact, some of the preclinical studies suggest that some of these biologics may actually synergize with the immunotherapy and actually make the immunotherapy more effective from a tumor perspective and calm down the irAE as sort of the bystander effect. So we are still trying to optimize those. Getting up trials in the space has been very difficult. That is one of the reasons for the genesis of ASPIRE because we realized we needed to band together to have a bigger voice in that realm. Then there are other things that are brand new. So we talked about Triple-M. So Triple-M, again, with Triple-M or any myocarditis or myasthenia, I mean, there is about a 50% chance of death from irAE based on the literature. I think we are getting better at recognizing this, and so at Stanford we have some data to say that if you serially follow troponin, that maybe your outcomes are better. You can potentially lower the percentage of cases that are fatal because you can catch them early. I mean, this is all preliminary data, but again, these are all things that are evolving, and we do not all have the right answer. I mean, even the serial troponin thing, I think, is pretty controversial. And in fact, at one of our quarterly Zoom meetings that we are doing in ASPIRE in December is going to sort of flush out that controversy about serial troponin measuring and what is the best thing to use? Would you use something like abatacept or would you use ruxolitinib? Which one is better? I think there is a lot of controversy still about these things. Dr Monty Pal: You have really piqued my curiosity here because you think about the cons of treating irAEs, right? And I worry exactly about what you had mentioned, right, which is, "Gosh, what is going on with this tumor in terms of immunosuppression?" But you think about some of the newer agents, you mentioned ruxolitinib, I have heard of dasatinib, for instance, in this setting. Frankly speaking, a lot of these, as you point out, are really thought of as being also anticancer drugs. So you have really got me thinking about the potential synergy between perhaps suppressing an irAE and augmenting antitumor activity, which I think is very interesting. Am I on the right track with that? Dr Pauline Funchain: I think so, but you will find that a lot of people will not even go there because they a

06/11/2025

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15 min
31/07/2024

JCO PO Article Insights: Statistical Considerations for Biomarker-Driven Oncology Clinical Trials

In this JCO Precision Oncology Article Insights episode, Miki Horiguchi summarizes two articles: "Biomarker-Driven Oncology Trial Design and Subgroup Characterization: Challenges and Potential Solutions" by Wang, et al. published on June 7, 2024, and "Biomarkers in Oncology: Complexities in Biomarker-Driven Studies and Statistical Analysis" by Uno, et al. published on July 22, 2024. TRANSCRIPT Miki Horiguchi: Hello and welcome to JCO Precision Oncology Article Insights. I'm your host, Miki Horiguchi, an ASCO Journal Editorial Fellow. Today, I'll be providing summaries for two articles. The first article is a review article titled, "Biomarker-Driven Oncology Trial Design and Subgroup Characterization: Challenges and Potential Solutions," by Dr. Jian Wang and colleagues. Biomarker driven clinical trials represent a key component of precision medicine, focusing on tailoring treatments to patients based on specific biomarkers. By identifying and targeting therapies to patients who are most likely to benefit, these trials aim to improve treatment outcomes and reduce adverse events. The article highlights several important points to optimize biomarker driven clinical trials. The authors first reviewed US FDA approvals in biomarker defined subgroups and conducted an in-depth analysis of key regulatory considerations. They developed an innovative decision tree to guide designing biomarker based clinical trials. In addition, they clarified the statistical challenges, including ones found in the all-comers study design. The authors found that most of the US FDA approvals are being restricted to the biomarker positive subgroup, indicating that observed treatment benefits in the overall population are heavily influenced by the biomarker positive patients. This raises concerns as the treatment effect in the biomarker negative subgroup may be smaller but still clinically meaningful. Additionally, achieving adequate statistical power for the biomarker negative subgroup is often not feasible. These factors could limit access to the treatment for biomarker negative patients who might benefit from it. To address these challenges, the authors introduced various statistical methods and conducted numerical studies to compare the performance of several of these methods. They found that a promising approach is a Bayesian Dynamic Borrowing Method that leverages evidence from the biomarker positive subgroup to evaluate the treatment effect in the biomarker negative subgroup. The authors emphasize that any statistical method used for subgroup analysis must be prespecified. Proactive engagement with regulatory authorities and alignment with the guidelines before finalizing study designs and analysis plans are also essential. The second article is an editorial which accompanies the first article, "Biomarkers in Oncology: Complexities in Biomarker-Driven Studies and Statistical Analysis" by Dr. Hajime Uno and Dr. Miki Horiguchi. In this editorial, the authors introduced additional statistical considerations that can further enhance informed decision making based on the results of biomarker driven oncology clinical trials. Specifically, the authors raised three key points to consider. Number one is controlling the type 1 error rate. The qualitative assessment of a new treatment involves a statistical test, while regulatory decisions consider the totality of evidence rather than evidence based solely on P values. Statistical tests play a crucial role in determining treatment benefits in each of the three analysis populations, that is, the biomarker positive, the biomarker negative, and the all-comers population. The type 1 error rate of a statistical test is the probability of rejecting the null hypothesis when it is actually true. The threshold for the type 1 error rate is conventionally at 0.05. The threshold value can vary depending on the situation, but maintaining the type 1 error rate at the nominal level is essential to ensure the reliability of the conclusions drawn from a statistical test. Any inflation or deflation of the type 1 error rate from the nominal level can lead to significant issues in regulatory decision making. Number two is choosing robust and interpretable quantitative summaries of treatment effect. Statistical tests provide a binary outcome aiding regulatory decisions like drug approval. However, quantifying the magnitude of the treatment effect is more informative for clinicians and patients when assessing the risk benefit balance of the treatment. Therefore, the choice of a summary measure to quantify the between group difference is also important. Dr. Wang and colleagues use the Cox Hazard ratio in their study, which is the most common summary measure in oncology trials. Yet this measure relies on several assumptions. Specifically, when it is applied to biomarker driven trials, the proportional hazards assumption must hold in both biomarker positive and biomarker negative subgroups. In addition, when a stratified Cox analysis is used to integrate the hazard ratio of the two subgroups to derive the hazard ratio for the all-comers population, there is an underlying assumption that the hazard ratios from the biomarker positive and biomarker negative subgroups are the same. These assumptions do not usually hold in practice, and violations of these assumptions can compromise the interpretability of the estimated between group difference and its generalizability to future patient populations. It has also been discussed widely in both statistical and clinical journals that the hazard ratio is difficult to interpret because of the lack of absolute hazards from the treatment and control groups. To address these limitations, Doctors Uno and Horiguchi suggested using alternative summary measures, including restricted mean survival time and average hazard with survival rate, which do not share these limitations and offer more robust and interpretable results than the conventional hazards ratio approach. Number three is using coherent statistical analysis models for the three analysis populations. In the first article, Dr. Wang and colleagues introduced a Bayesian Dynamic Borrowing approach. The primary analysis of their approach borrowed information from the biomarker positive subgroup only when analyzing the biomarker negative subgroup. They did not perform the borrowing when they analyzed the biomarker positive subgroup. The accompanying editorial highlights the potential bias introduced by this asymmetric approach. Specifically, suppose the treatment effect in the biomaker positive subgroup is pronounced, but that in the biomarker negative subgroup is weaker. In this case, their asymmetric approach produces a more favorable result for the biomarker positive subgroup compared to the symmetric approach, where each subgroup follows the information from the other subgroup. Providing a convincing rationale for using an asymmetric approach or conducting a sensitivity analysis with a coherent approach for both subgroups would be required. To conclude, biomarker driven oncology trials are diverse and complex, requiring a tailored approach to statistical analysis that considers the unique characteristics of each trial. The Bayesian approach represents one useful analytic approach, but might not be a universal solution for all biomarker driven studies. Further discussions among stakeholders, such as those from regulatory authorities, clinicians, and biostatisticians will stimulate further research on the optimal design and analysis methods for biomarker driven clinical trials in precision oncology. Thank you for listening to JCO Precision Oncology Article Insights and please tune in for the next topic. Don't forget to give us a rating or review and be sure to subscribe so you never miss an episode. You can find all ASCO shows at asco.org/podcast. 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.

31/07/2024

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10 min
16/09/2025

Postmastectomy Radiation Therapy: ASTRO-ASCO-SSO Guideline

Dr. Kathleen Horst, Dr. Rachel Jimenez, and Dr. Yara Abdou discuss the updated guideline from ASTRO, ASCO, and SSO on postmastectomy radiation therapy. They share new and updated recommendations on topics including PMRT after upfront surgery, PMRT after neoadjuvant systemic therapy, dose and fractionation schedules, and delivery techniques. They comment on the importance of a multidisciplinary approach and providing personalized care based on individual patient characteristics. Finally, they review ongoing research that may impact these evidence-based guidelines in the future. Read the full guideline, "Postmastectomy Radiation Therapy: An ASTRO-ASCO-SSO Clinical Practice Guideline" at www.asco.org/breast-cancer-guidelines" TRANSCRIPT This guideline, clinical tools, and resources are available at www.asco.org/breast-cancer-guidelines. Read the full text of the guideline and review authors' disclosures of potential conflicts of interest in the Journal of Clinical Oncology, https://ascopubs.org/doi/10.1200/JCO-25-01747 Brittany Harvey: Hello and welcome to the ASCO Guidelines podcast, one of ASCO's podcasts delivering timely information to keep you up to date on the latest changes, challenges, and advances in oncology. You can find all the shows, including this one, at asco.org/podcasts. My name is Brittany Harvey, and today I am interviewing Dr. Kathleen Horst, expert panel chair from Stanford University; Dr. Rachel Jimenez, expert panel vice chair from Massachusetts General Hospital; and Dr. Yara Abdou, ASCO representative from the University of North Carolina, authors on "Postmastectomy Radiation Therapy: An American Society for Radiation Oncology, American Society of Clinical Oncology, and Society of Surgical Oncology Clinical Practice Guideline." Thank you for being here today, Dr. Horst, Dr. Jimenez, and Dr. Abdou. Dr. Kathleen Horst: Thank you for having us. Brittany Harvey: And then just before we discuss this guideline, I would like to note that ASCO takes great care in the development of its guidelines and ensuring that the ASCO conflict of interest policy is followed for each guideline. The disclosures of potential conflicts of interest for the guideline panel, including Dr. Horst, Dr. Jimenez, and Dr. Abdou who have joined us here today, are available online with the publication of the guideline in the Journal of Clinical Oncology, which is linked in the show notes. Then to dive into the content that we are here today to talk about, Dr. Horst, could you start us off by describing what prompted the update for this joint guideline between ASTRO, ASCO, and SSO, and what is the scope of this 2025 guideline on postmastectomy radiation therapy? Dr. Kathleen Horst: Thank you. This joint guideline was last updated in 2016. Over the past decade, the treatment of breast cancer has evolved substantially. Newer systemic therapy regimens have increasingly personalized treatment based on tumor biology, and local therapy management has explored both the de-escalation of axillary surgery and more abbreviated courses of radiation therapy. Given these advances, it was important to revisit the role of postmastectomy radiotherapy in this modern era of breast cancer therapy. This updated guideline addresses four key questions, including postmastectomy radiation therapy after upfront surgery as well as after neoadjuvant systemic therapy. It also reviews the evolving role of various dose and fractionation schedules and optimal treatment techniques and dose constraints. Brittany Harvey: Excellent. I appreciate that background, Dr. Horst. So then, next, Dr. Jimenez, I would like to review the recommendations of this guideline across those four key questions that Dr. Horst just mentioned. So first, what does the panel recommend for PMRT for patients who received initial treatment with mastectomy? Dr. Rachel Jimenez: The panel provided pretty strong consensus that patients with positive lymph nodes or patients with large tumors involving the skin or the chest wall should receive postmastectomy radiation. However, the panel also recognized that the omission of postmastectomy radiation may be appropriate for select patients who have positive lymph nodes and have an axillary lymph node dissection if they have a low nodal burden and other favorable clinical or pathologic features. For patients without lymph node involvement at the time of surgery and no involvement of the skin or chest wall, postmastectomy radiation was not advised by the panel. Brittany Harvey: Understood. It is helpful to understand those recommendations for that patient population. Following that, Dr. Abdou, what are the key recommendations for PMRT for patients who received neoadjuvant systemic therapy before mastectomy? Dr. Yara Abdou: When we think about PMRT after neoadjuvant treatment, the key point is that the initial stage of presentation still matters a lot. So for example, if a patient comes in with more advanced disease, say a large primary tumor, like a clinical T4, or more extensive nodal disease, like an N2 or N3 disease, those patients should get PMRT, no matter how well they respond to neoadjuvant therapy, because we know it reduces the risk of recurrence and that has been shown pretty consistently. On the other hand, if there are still positive lymph nodes after neoadjuvant treatment, basically residual nodal disease, PMRT is also strongly recommended because the risk of local-regional recurrence is much higher in that setting. The gray area is the group of patients who start with a lower burden of nodal disease, such as N1 disease, but then become node negative at surgery. For those patients, we tend to individualize the decision. So if the patient is young or has triple-negative disease, or if there is a lot of residual disease in the breast even though the nodes are cleared, then radiation is probably helpful. But if everything has melted away with pCR in both the breast and the nodes, then it may be safe to omit PMRT in those patients. For patients with smaller tumors and no nodal involvement to begin with, like a clinical T1-T2 N0, if they are still node negative after neoadjuvant treatment, then PMRT is generally not recommended because their baseline recurrence risk is low. And finally, if the margins are positive and cannot be re-excised, then PMRT is recommended after neoadjuvant therapy. Brittany Harvey: Yes, those distinctions are important for appropriate patient selection. So then, Dr. Horst, we have just reviewed the indications for PMRT, but for those patients who receive PMRT, what are the appropriate treatment volumes and dose fractionation regimens? Dr. Kathleen Horst: The guideline addresses coverage of the chest wall and regional nodes with a specific discussion of the data regarding internal mammary nodal irradiation, which has been an area of controversy over many years. The guideline also reviews the data exploring moderate hypofractionation, or shorter courses of radiation therapy. The task force recommends utilizing moderate hypofractionation for the majority of women requiring postmastectomy radiation, which is likely to have a large impact on clinical practice. This recommendation is based on the evolving data demonstrating that a 3-week course of radiotherapy after mastectomy provides similar oncologic outcomes and minimal toxicity for most patients compared to the standard 5-week treatment course. Brittany Harvey: Thank you for reviewing that set of recommendations as well. So then, Dr. Jimenez, to wrap us up on the key questions here, what delivery techniques are recommended for treating patients who receive PMRT? Dr. Rachel Jimenez: So this portion of the guideline is likely to be most helpful for radiation oncologists because it represents the most technical part of the guideline, but we do believe that it offers some important guidance that has, to this point, been lacking in the postmastectomy radiation setting. So first, the panel recommends that all patients should undergo 3-dimensional radiation planning using CAT scan based imaging, and this includes contouring. So contouring refers to the explicit identification, using a drawing interface on the CAT scan imaging, by the radiation oncologist to identify the areas that are targeted to receive radiation, as well as all of the nearby normal tissues that could receive unintended radiation exposure. And we also provide radiation oncologists in the guideline with suggestions about how much dose each target tissue should receive and what the dose limits should be for normal tissues. Additionally, we make some recommendations regarding the manner in which radiation is delivered. So for example, we advise that when conventional radiation methods are not sufficient for covering the areas of the body that are still at risk for cancer, or where too high of a dose of radiation would be anticipated to a normal part of the body, that providers employ a technique called intensity modulated radiation therapy, or IMRT. And if IMRT is going to be used, we also advise regular 3-dimensional imaging assessments of the patient's body relative to the treatment machine to ensure treatment fidelity. When the treatments are delivered, we further advise using a deep inspiration breath-hold technique, which lowers the exposure to the heart and to the lungs when there is concern for cardiopulmonary radiation exposure, and again, that image guidance be used along with real-time monitoring of the patient's anatomy when those techniques are employed. And then finally, we advise that patients receiving postmastectomy radiation utilize a bolus, or a synthetic substance placed on the patient's skin to enhance radiation dose to the superficial tissue, only when there is involvement of the skin with cancer or other high-risk features of the cancer, but not for every patient who receives postmastectomy radiation. Br

16/09/2025

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16 min

ASCO Podcasts by the American Society of Clinical Oncology, cover a range of educational and scientific content, offering enriching insight into the world of cancer care. Hear innovative interviews with the authors, researchers, and clinicians who are defining today’s standard of care and tomorrow’s breakthroughs. You can find all ASCO podcasts and limited series at ascopubs.org/podcasts