In this episode, Kevin Kalinsky, MD, MS, FASCO, and Sara M. Tolaney, MD, MPH, discuss the most clinically relevant data in breast cancer presented at the 2025 ASCO Annual Meeting, including: DESTINY-Breast09: phase III trial of trastuzumab deruxtecan with or without pertuzumab vs THP as first-line treatment of HER2-positive advanced/metastatic breast cancer ASCENT-04/KEYNOTE-D19: phase III trial of first-line sacituzumab govitecan plus pembrolizumab vs chemotherapy plus pembrolizumab in PD-L1–positive advanced TNBC SERENA-6: phase III trial of ctDNA-guided switch to camizestrant plus CDK4/6i vs continued AI plus CDK4/6i following ESR1 mutation emergence in HR-positive/HER2-negative advanced breast cancer INAVO120: OS from phase III study of first-line inavolisib/PBO plus palbociclib plus fulvestrant in PIK3CA-mutated, HR-positive/HER2-negative, endocrine-resistant advanced breast cancer Presenters: Kevin Kalinsky, MD, MS, FASCO Professor of Medicine Louisa and Rand Glenn Family Chair in Breast Cancer Research Winship Cancer Institute Emory University Atlanta, Georgia Sara M. Tolaney, MD, MPH Chief, Breast Oncology Dana-Farber Cancer Institute Associate Professor of Medicine Harvard Medical School Boston, Massachusetts Content based on an online CME program supported by independent educational grants from AstraZeneca, Daiichi Sankyo, Inc, Gilead Sciences, Inc., Lilly, Novartis Pharmaceuticals Corporation, and Stemline Therapeutics, Inc. Link to full program: https://bit.ly/4lFS4BC Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.