Durvalumab (MEDI4736) with or without tremelimumab in MSS and MSI colorectal and endometrial tumors

Primary objectives: To assess the antitumor activity of Durvalumab or Tremelimumab 300 mg single dose followed by Durvalumab in patients with microsatellite instable (MSI) colorectal cancer (CRC) or endometrial cancer (EC) and Tremelimumab 300 mg single dose followed by Durvalumab in refractory microsatellite stable (MSS) CRC and EC as defined by objective response rate (ORR) according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
Primary endpoints: Objective response rate (ORR) according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1, and iRECIST if applicable, in patients with advanced, immune naïve MSS CRC, MSS EC, MSI CRC and MSI EC.