Trastuzumab Deruxtecan (T-DXd) + Pertuzumab (P) vs Taxane + Trastuzumab + Pertuzumab (THP) for First-Line (1L) Treatment of Patients With Human Epidermal Growth Factor Receptor 2–Positive (HER2+) Advanced/Metastatic Breast Cancer (a/mBC): Interim Results From DESTINY-Breast09

Sara Tolaney, MD, MPH, presents results from the phase 3 DESTINY-Breast09 study showing that trastuzumab deruxtecan plus pertuzumab improved progression-free survival vs taxane, trastuzumab and pertuzumab (THP) as a first-line treatment in patients with HER2 positive metastatic breast cancer.