The purpose of this registry is to document the characteristics and management of patients with metastatic castrate resistant prostate cancer (mCRPC) in routine clinical practice, independent of treatment used. Given the rapidly evolving landscape in mCRPC treatments, there is a need for a current and improved understanding of how these treatments fit into the current treatment paradigm for mCRPC, how they are combined and sequenced, and how their relative effectiveness profiles emerge outside of a clinical trial setting. This will be based on documentation and description of sequencing of treatment initiation, termination, and duration; relative effectiveness of treatments; defined medical resource utilization (MRU) and quality-of-life parameters and follow-up for survival.