Phase 2 randomized cross-over trial of abiraterone + prednisone (ABI+P) vs enzalutamide (ENZ) for patients (pts) with metastatic castration resistant prostate cancer (mCPRC): Results for 2nd-line therapy.

5015Background: ABI+P and ENZ have similar efficacy for 1st-line treatment of mCRPC but cross-resistance confounds treatment with the alternate agent at progression. The optimal sequencing has not ...