Scott T. Tagawa, MD, MS, FACP, Weill Cornell Medicine, New York City, NY, presents the final results of the Phase I/II trial of fractionated dose 177Lu-PSMA-617 for patients with metastic castration-resistant prostate cancer (mCRPC). In this study, a single-cycle of fractionated-dose 177Lu-PSMA-617 was determined to be safe in patients with mCRPC. Despite no pre-selection for PSMA expression, most have post-treatment PSA decline with favorable biochemical and radiographic progression-free survival compared to historical non-PSMA controls and similar to PSMA-selected studies administering multiple cycles in a less dose-intense fashion. This interview took place at the European Society for Medical Oncology (ESMO) 2021 congress.