Detecting Tumor DNA in the Blood of HR+/HER2-low Metastatic Breast Cancer Patients to Find Candidates for T-DXd Therapy
After an initial screening phase to identify patients with persistent blood circulating DNA tumors, patients will be enrolled in the treatment phase that was designed as an open-label, multicentre, phase II study, to test the efficacy of trastuzumab deruxtecan in terms of progression-free survival (PFS).