Featuring perspectives from Dr Lisa A Carey and Dr Rita Nanda, including the following topics:

• Overview: Molecular basis of antibody-drug conjugate (ADC) toxicities — Sequencing of ADCs and mechanisms of resistance (0:00)
• Case: A woman in her late 60s with localized triple-negative breast cancer develops myocarditis during neoadjuvant therapy with chemotherapy/pembrolizumab — Richard Zelkowitz, MD (8:22)
• Case: A woman in her mid 70s with recurrent ER-negative, HER2-low, PD-L1-positive metastatic breast cancer (mBC) who experiences disease progression on nab paclitaxel/atezolizumab responds to sacituzumab govitecan — Ranju Gupta, MD (26:43)
• Case: A woman in her early 80s with recurrent ER-positive, HER2-low (IHC 1+) mBC experiences disease progression on trastuzumab deruxtecan (T-DXd), then receives datopotamab deruxtecan and develops pulmonary symptoms — Laila Agrawal, MD (32:11)
• Data Review: T-DXd (37:51)
• Case: A woman in her early 70s with recurrent ER-positive, HER2-low (IHC 1+) mBC, including bladder metastases, experiences disease progression after palbociclib/letrozole, then capivasertib/fulvestrant, then nab paclitaxel — Justin Favaro, MD, PhD (44:02)
• Case: A woman in her late 70s with ER-positive, HER2-low mBC who experiences disease progression after 1 year of ribociclib/letrozole receives sacituzumab govitecan — Erik Rupard, MD (55:19)

CME information and select publications