The HER2-directed antibody-drug conjugate Enhertu (trastuzumab deruxtecan) has won FDA approval for patients with unresectable or metastatic HER2-low breast cancer. Enhertu, a HER2-directed antibody drug conjugate, is now the first approved therapy for patients with the HER2-low breast cancer subtype. The recent approval covers patients with HER2-low breast cancer if they have had chemotherapy for…