News
Media
Conferences
Events
Partners
Publications
Resources
Biomarker Consortium
Subscribe

Your AI-Trained Oncology Knowledge Connection!

Opinion|Videos|January 23, 2025

Endocrine Sensitivity and the Prognostic and Clinical Implications

Author(s)Katherine Clifton, MD, Shipra Gandhi, MD

Dr. Gandhi and Dr. Clifton explore the prevalence and mechanisms of resistance to first-line endocrine therapy combined with CDK4/6 inhibitors in hormone receptor–positive/HER2-negative (HR+/HER2–) breast cancer.

Episodes in this series

EP. 1 Shifting Paradigms: Biomarker Testing and ESR1 Mutation Surveillance in HR+ HER2- Breast Cancer

EP. 1 Shifting Paradigms: Biomarker Testing and ESR1 Mutation Surveillance in HR+ HER2- Breast Cancer

EP. 2 Endocrine Sensitivity and the Prognostic and Clinical Implications

EP. 2 Endocrine Sensitivity and the Prognostic and Clinical Implications

EP. 3 Approved and Investigational SERDs in HR+/HER2– Breast Cancer

EP. 3 Approved and Investigational SERDs in HR+/HER2– Breast Cancer

EP. 4 Imlunestrant Clinical Data: Insights From the EMBER and EMBER-3 Trials

EP. 4 Imlunestrant Clinical Data: Insights From the EMBER and EMBER-3 Trials

EP. 5 Translating Data With Oral SERDs to Practice: EMBER-3, SERENA-2, and Ongoing Trials

EP. 5 Translating Data With Oral SERDs to Practice: EMBER-3, SERENA-2, and Ongoing Trials

EP. 6 Insights From SABCS 2024 and Future Directions in Breast Cancer

EP. 6 Insights From SABCS 2024 and Future Directions in Breast Cancer

Video content above is prompted by the following:

What proportion of patients with HR+/HER2– breast cancer experience resistance to first-line endocrine therapy plus CDK4/6 inhibitor?
What are some of the mechanisms of resistance that can emerge following endocrine therapy and CDK4/6 inhibitors in HR+/HER2– breast cancer?
How you think about endocrine resistance in the post-CDK4/6 setting? What signals—clinical, molecular, or otherwise—influence your treatment sequencing decisions?
How does treatment resistance after first-line treatment create challenges in selecting second-line therapies?

Newsletter

Stay up to date on the most recent and practice-changing oncology data

Related Content

Experts featured in this series.

Clinical Assessment and Pharmacologic Considerations for Diarrhea Management in HR+/HER2-Negative Advanced Breast Cancer

ByDr. Neil Iyengar, MD,Heather Moore, CPP, PharmD,Sarah Donahue, MPH, NP, AOCNP

February 6th 2026

Experts featured in this series.

Pharmacy-Led Strategies for Early Diarrhea Management in HR+/HER2-Negative Advanced Breast Cancer

ByDr. Neil Iyengar, MD,Heather Moore, CPP, PharmD,Sarah Donahue, MPH, NP, AOCNP

February 6th 2026

2 experts are featured in this series.

Clinical Implications of Progression After First-Line T-DXd in HER2 Positive Metastatic Breast Cancer

ByNeil M. Iyengar, MD,William Gradishar, MD, Northwestern Medicine

February 5th 2026

2 experts are featured in this series.

Managing Disease Burden, ILD Risk, and CNS Progression in HER2 Positive Metastatic Breast Cancer

ByNeil M. Iyengar, MD,William Gradishar, MD, Northwestern Medicine

February 5th 2026

2 experts are featured in this series.

Sequencing Endocrine Therapy and CDK4-6 Inhibition

ByErica L. Mayer, MD, MPH,Kelly E. McCann, MD, PhD

February 4th 2026

Latest CME

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Washington State Medical Oncology Society

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Washington State Medical Oncology Society

Marla D. Lipsyc-Sharf, MD; Ashley Frith, MD

A Breath of Strength: Managing Cancer Associated LEMS and Lung Cancer as One

A Breath of Strength: Managing Cancer Associated LEMS and Lung Cancer as One

Estelamari Rodriguez, MD, MPH; Millie Das, MD; Ruham Nasany, MD

Striking the Right Nerve: Managing Cancer Associated LEMS in Lung Cancer Patients

Striking the Right Nerve: Managing Cancer Associated LEMS in Lung Cancer Patients

Anne Chiang, MD, PhD; J. Douglas Miles, MD, PhD, FAAN; Suma Satti, MD

Show Me the Data™: Bridging Clinical Gaps Along the Continuum From Resectable, Early Stage to Advanced Gastric/Gastroesophageal Junction Cancers

Show Me the Data™: Bridging Clinical Gaps Along the Continuum From Resectable, Early Stage to Advanced Gastric/Gastroesophageal Junction Cancers

Zev A. Wainberg, MD; Manish A. Shah, MD, FASCO; Syma Iqbal, MD

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Kentucky Society of Clinical Oncology

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Kentucky Society of Clinical Oncology

Marla D. Lipsyc-Sharf, MD; Munaf Alkadimi, MD

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Indiana Oncology Society

Community Oncology Connections™: Beyond Primary End Points—Digging Into Randomized and Real-World Data to Guide Challenging Treatment Decisions in HR+/HER2− Metastatic Breast Cancer | Indiana Oncology Society

Shaina Rozell, MD, MPH; Seth A. Wander, MD, PhD

19th Annual New York GU Cancers Congress™

In-Person Event

19th Annual New York GU Cancers Congress™

March 13-14, 2026

Medical Crossfire®: Expert Interpretations of the Latest Data in CLL Management – Understanding the Impact of Optimal Treatment Selection on Patient Outcomes

Medical Crossfire®: Expert Interpretations of the Latest Data in CLL Management – Understanding the Impact of Optimal Treatment Selection on Patient Outcomes

Jennifer R. Brown, MD, PhD; Alexey V. Danilov, MD, PhD; Matthew S. Davids, MD, MMSc

Virtual Testing Board: Digging Deeper on Your Testing Reports to Elevate Patient Outcomes in Advanced Non–Small Cell Lung Cancer

Virtual Testing Board: Digging Deeper on Your Testing Reports to Elevate Patient Outcomes in Advanced Non–Small Cell Lung Cancer

Stephen V. Liu, MD; Michelle Afkhami, MD; Ignacio I. Wistuba, MD; Helena Yu, MD

Medical Crossfire® – From Diagnostic Dilemmas to Potential Treatment Breakthroughs: Exploring Novel Targets for Extrapulmonary Neuroendocrine Carcinomas

In-Person + Virtual Event

Medical Crossfire® – From Diagnostic Dilemmas to Potential Treatment Breakthroughs: Exploring Novel Targets for Extrapulmonary Neuroendocrine Carcinomas

March 24, 2026

Addressing Unmet Needs in HER2+ Metastatic BTC

Addressing Unmet Needs in HER2+ Metastatic BTC

Rahul Gosain, MD, MBA; Rohit Gosain, MD; Ghassan Abou-Alfa, MD, MBA

Community Practice Connections™: Tailored Treatment Approaches for Older Patients With Advanced HR+/HER2– Breast Cancer

Community Practice Connections™: Tailored Treatment Approaches for Older Patients With Advanced HR+/HER2– Breast Cancer

Hope S. Rugo, MD, FASCO; Neil M. Iyengar, MD; Komal Jhaveri, MD, FACP

Community Practice Connections™: Empowering Interventional Radiologists in the Emerging Era of Oncolytic Immunotherapies for Melanoma

Community Practice Connections™: Empowering Interventional Radiologists in the Emerging Era of Oncolytic Immunotherapies for Melanoma

Yana G. Najjar, MD; Douglas B. Johnson, MD, MSCI; Rahul A. Sheth, MD, FSIR

GI Tumor Board—Applying Recent Advances in Biomarker Testing and Treatment in Metastatic Colorectal Cancer

GI Tumor Board—Applying Recent Advances in Biomarker Testing and Treatment in Metastatic Colorectal Cancer

John H. Strickler, MD; Stacey A. Cohen, MD; Aparna Parikh, MD; Kanwal P.S. Raghav, MBBS, MD

Medical Crossfire®: Harnessing the Power of Modern Therapies in Newly Diagnosed Multiple Myeloma

Medical Crossfire®: Harnessing the Power of Modern Therapies in Newly Diagnosed Multiple Myeloma

C. Ola Landgren, MD, PhD; Mohamad Mohty, MD, PhD; Surbhi Sidana, MD

Medical Crossfire®: Expert Perspectives on Targeting c-Met Overexpression and 𝘔𝘌𝘛 Genomic Alterations in NSCLC – Unveiling the Complexities of 𝘔𝘌𝘛 Dysregulation

Medical Crossfire®: Expert Perspectives on Targeting c-Met Overexpression and 𝘔𝘌𝘛 Genomic Alterations in NSCLC – Unveiling the Complexities of 𝘔𝘌𝘛 Dysregulation

Rebecca Heist, MD, MPH; Alex A. Adjei, MD, PhD, FACP; Sandip Patel, MD, FASCO; Jeremy Segal, MD, PhD

PER Tumor Board®: Applying Recent Advances to Transform the Treatment Paradigm in SCLC—Expert Perspectives on New Approvals and Emerging Strategies

PER Tumor Board®: Applying Recent Advances to Transform the Treatment Paradigm in SCLC—Expert Perspectives on New Approvals and Emerging Strategies

Jonathan W. Goldman, MD; Percy Lee, MD, FASTRO; Erminia Massarelli, MD, PhD, MS; Misty D. Shields, MD, PhD

Cases & Conversations™: Transforming AML Care—Precision Strategies, Evolving Therapies, and Clinical Insights

Cases & Conversations™: Transforming AML Care—Precision Strategies, Evolving Therapies, and Clinical Insights

Gail J. Roboz, MD; Hagop Kantarjian, MD; Catherine Lai, MD, MPH; Amer Zeidan, MBBS, MHS

Medical Crossfire®: Precision Medicine in Glioma Treatment — Integration of Molecular Profiling to Inform Targeted Therapies

Medical Crossfire®: Precision Medicine in Glioma Treatment — Integration of Molecular Profiling to Inform Targeted Therapies

Vinay K. Puduvalli, MD; Manmeet Ahluwalia, MD, MBA; Stephen J. Bagley, MD, MSCE; Angela Waanders, MD, MPH, MS

Medical Crossfire®: Integrating Next-Generation Endocrine Targeting Therapies to Improve Outcomes for Patients With HR+/HER2- Breast Cancer

Medical Crossfire®: Integrating Next-Generation Endocrine Targeting Therapies to Improve Outcomes for Patients With HR+/HER2- Breast Cancer

William J. Gradishar, MD, FASCO, FACP; Laura Huppert, MD; Yuan Yuan, MD, PhD

$Cases and Conversations™: Sorting Through the Expanding Treatment Options for Patients with Relapsed/Refractory Multiple Myeloma$

Cases and Conversations™: Sorting Through the Expanding Treatment Options for Patients with Relapsed/Refractory Multiple Myeloma

C. Ola Landgren, MD, PhD; Mohamad Mohty, MD, PhD; Surbhi Sidana, MD

Medical Crossfire®: Improving Patient Outcomes in Myeloproliferative Neoplasms With Novel Therapeutic Approaches

Medical Crossfire®: Improving Patient Outcomes in Myeloproliferative Neoplasms With Novel Therapeutic Approaches

Rami Komrokji, MD; Gabriela Hobbs, MD; John Mascarenhas, MD; Naveen Pemmaraju, MD

Community Oncology Connections™: Optimizing SCLC Treatment Strategies and Managing Adverse Events Across Disease Stages | South Carolina

Community Oncology Connections™: Optimizing SCLC Treatment Strategies and Managing Adverse Events Across Disease Stages | South Carolina

Misty D. Shields, MD, PhD; Rujul Parikh, MD

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | Kansas

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | Kansas

Charu Aggarwal, MD, MPH, FASCO; Yifan Tu, MD, PhD

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | Wyoming and Montana

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | Wyoming and Montana

Charu Aggarwal, MD, MPH, FASCO; Mo Ziari, MD

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | New Mexico

Personalized Management in NSCLC: Strategies for Early Detection, Molecular Testing, and Targeted Therapies | New Mexico

Zofia Piotrowska, MD, MHS; Shan Guo, MD

Community Oncology Connections™: Optimizing SCLC Treatment Strategies and Managing Adverse Events Across Disease Stages | North Carolina

Community Oncology Connections™: Optimizing SCLC Treatment Strategies and Managing Adverse Events Across Disease Stages | North Carolina

Misty D. Shields, MD, PhD; Michelle Ojemuyiwa, MD

Live Tumor Board: Squamous Cell Carcinoma of the Head & Neck – Post-CRT Decisions in the Locally Advanced Setting

In-Person + Virtual Event

Live Tumor Board: Squamous Cell Carcinoma of the Head & Neck – Post-CRT Decisions in the Locally Advanced Setting

February 19, 2026

Community Practice Connections™: Optimizing Treatment Outcomes and Preserving Fertility in Premenopausal HR+ Breast Cancer

Community Practice Connections™: Optimizing Treatment Outcomes and Preserving Fertility in Premenopausal HR+ Breast Cancer

Rebecca Shatsky, MD; Kelly McCann, MD, PhD; Michelle L. Taylor, ANP-BC

From Bench to Bedside: Paradigm Shifts in HER2+ Metastatic BTC Treatment

From Bench to Bedside: Paradigm Shifts in HER2+ Metastatic BTC Treatment

Rahul Gosain, MD, MBA; Rohit Gosain, MD; Shubham Pant, MD, MBBS

Proactive Adverse Event Management for HER2+ BTC Treatments

Proactive Adverse Event Management for HER2+ BTC Treatments

Rahul Gosain, MD, MBA; Rohit Gosain, MD; Rachna T. Shroff, MD, MS, FASCO

A Case-Guided Discussion on Managing Immune Thrombocytopenic Purpura (ITP)

A Case-Guided Discussion on Managing Immune Thrombocytopenic Purpura (ITP)

Cindy Neunert, MD, MSCS; Hanny Al-Samkari, MD; Joseph Shatzel, MD, MCR

Tumor Board: Expert Insights on Managing Classical 𝘌𝘎𝘍𝘙 Mutations, 𝘌𝘎𝘍𝘙 Exon 20 Insertions, and Atypical 𝘌𝘎𝘍𝘙 Mutations in Metastatic NSCLC

Tumor Board: Expert Insights on Managing Classical 𝘌𝘎𝘍𝘙 Mutations, 𝘌𝘎𝘍𝘙 Exon 20 Insertions, and Atypical 𝘌𝘎𝘍𝘙 Mutations in Metastatic NSCLC

Balazs Halmos, MD, MS; Enriqueta Felip, MD, PhD; Julia Rotow, MD

Evolving Treatment Strategies in Pancreatic Cancer: Current Standards, Emerging Targets, and the Role of Molecular Testing

Evolving Treatment Strategies in Pancreatic Cancer: Current Standards, Emerging Targets, and the Role of Molecular Testing

Eileen M. O’Reilly, MD; E. Gabriela Chiorean, MD, FASCO; Michael J. Pishvaian, MD, PhD; Brian Wolpin, MD, MPH

Breast Cancer Tumor Board: Targeting TROP2 – Innovations in Triple-Negative Breast Cancer Treatment

Breast Cancer Tumor Board: Targeting TROP2 – Innovations in Triple-Negative Breast Cancer Treatment

Joyce O’Shaughnessy, MD; Matthew P. Goetz, MD; Hope S. Rugo, MD, FASCO

Trending on OncLive

Long-Term Cilta-Cel Data Show Low Rates of PFS Events in Standard-Risk R/R Myeloma

Nonresponse to Bridging Therapy and Peak ALC After Cilta-Cel Are Associated With Neurotoxicity, NRM in Myeloma

FDA Underscores Risks Associated With DPD Deficiency and Capecitabine/5-FU Use in Cancer Care

FDA Updates Axi-Cel Label to Remove Limitation of Use in R/R PCNSL

Orca-T With Reduced-Intensity Conditioning Yields Robust Efficacy in Hematologic Malignancies