Wednesday, October 16, 2019 CCTG IND232 (NCT02788773) - A Phase II Study of Durvalumab with or without Tremelimumab in Patients with Metastatic Castration Resistant Prostate Cancer has been closed to accrual after the completion of target accrual. The purpose of this study is to find out the effects of giving durvalumab alone or in combination with tremelimumab on this type of cancer. In addition, this study will look at the side effects of durvalumab when given alone or in combination with tremelimumab. The objective of the study is to determine the objective response rate (RECIST 1.1 and irRECIST) in patients with metastatic castration resistant prostate cancer (mCRPC) treated with durvalumab alone or in combination with tremelimumab. A secondary objective is to determine the prostate-specific antigen (PSA) response rate as time to PSA progression; To evaluate time to objective disease progression; To evaluate the toxicity and tolerability of durvalumab alone or in combination with tremelimumab. For more information please visit the IND232 Trial Page.