Aditya Bardia, MD, MPH, FASCO, discusses how fam-trastuzumab deruxtecan-nxki compares with physician’s choice of chemotherapy in estrogen receptor-positive/HER2-low breast cancer.
Trastuzumab, tested only as a single agent, has been shown to achieve 7% response in heavily pretreated patients with AOC with 3+ and 2+ HER2 immunostaining by immunohistochemistry (IHC).
The efficacy of trastuzumab deruxtecan after endocrine-based therapy in patients with metastatic breast cancer with low expression of human epidermal growth factor receptor 2 is unknown.