Approximately 670 adult participants with mCRPC will be randomized to receive either AZD2265 or standard of care treatment (investigator's choice of cabazitaxel, ARPI, or radium-223). They will receive their assigned treatment until disease progression, unacceptable toxicity, or other discontinuation criteria are met. Tumor evaluation scans will continue after treatment discontinuation until radiographically confirmed progression or death.
All patients will be followed for survival until the end of the study. An Independent Data Monitoring Committee (IDMC) composed of independent experts will be convened to monitor the safety and scientific integrity of the study.
