RecruitingPhase 4Drug trialPhase 4 Study to Assess the Safety of Trastuzumab Deruxtecan, in Indian PatientsA PROSPECTIVE, MULTI-CENTER, PHASE 4, SINGLE ARM STUDY TO ASSESS THE SAFETY OF TRASTUZUMAB DERUXTECAN, AN ANTI-HER2-ANTIBODY DRUG CONJUGATE IN INDIAN PATIENTS WITH UNRESECTABLE OR METASTATIC HER2-POSITIVE BREAST CANCER WHO HAVE RECEIVED A PRIOR ANTI-HER2-BASED REGIMEN