| Active, not recruiting | 2 | 311 | Canada, US | Apalutamide, ARN 509, ARN-509, ARN509, JNJ 56021927, JNJ-56021927, External Beam Radiation Therapy, Definitive Radiation Therapy, EBRT, External Beam Radiotherapy, External Beam RT, external radiation, External Radiation Therapy, external-beam radiation, Placebo, placebo therapy, PLCB, sham therapy | NRG Oncology, National Cancer Institute (NCI) | PSA Progression, Stage III Prostate Adenocarcinoma, Stage IV Prostate Adenocarcinoma | 12/24 | 10/28 | | |