Trastuzumab Deruxtecan在 DESTINY-Breast06 試驗中對 HER2 低表現或 HER2 超低表現的轉移性乳癌證明有效
T-DXd showed a statistically significant and clinically meaningful PFS benefit vs TPC (CT) in HER2-low mBC. HER2-ultralow results were consistent with HER2-low. Safety was in line with known profiles. DB-06 establishes T-DXd as a standard of care following ≥1 endocrine-based therapy for pts with HER2-low and -ultralow, HR+ mBC.