PROVIDENCE - Prospective non-interventional study (NIS) to examine patient-reported outcomes and real-world clinical data in patients with HER2-positive, HER2-low or HER2-ultralow unresectable or metastatic breast cancer treated with Trastuzumab Deruxtecan - PROVIDENCE

This is a prospective non-interventional, multicenter study observing patient reported outcomes as well as real-world efficacy and safety of trastuzumab deruxtecan (T-DXd) in patients with documented Human epidermal growth factor receptor 2 (HER2)-positive, HER2-low or HER2-ultralow unresectable or metastatic breast cancer (BC) receiving T-DXd in line with the applicable summary of product characteristics (SmPC) within routine clinical practice in Germany. In addition, patients will be informed about use of digital healthcare application (DiGA).

Eligible participants will be those patients with documented HER2-positive, HER2-low or HER2-ultralow unresectable or metastatic BC receiving T-DXd treatment in line with the applicable summary of product characteristics (SmPC) within routine clinical practice. All diagnostic and treatment procedures including visit frequency are at the discretion of the treating physician and not defined by the protocol. T-DXd treatment is considered as a selection criteria. Patients will be informed about use of digital healthcare application (DiGA). Approximately 800 eligible participants will be enrolled which includes 400 patients in the HER2-positive cohort and 400 patients in the HER2-low/ HER2-ultralow cohort.