Patients will be randomized to Arm A: gemcitabine plus carboplatin plus nivolumab versus Arm B: gemcitabine plus oxaliplatin plus nivolumab. Randomization will be stratified on the metastasis status (lymph node only vs. the rest). Patients on both treatment arms will receive up to 6 cycles of combination therapy in the absence of prohibitive adverse effects or disease progression. Patients with at least stable disease at the completion of 6 cycles of treatment may continue maintenance single agent nivolumab for up to 12 cycles. Patients who require discontinuation of chemotherapy (i.e., gemcitabine plus carboplatin or gemcitabine plus oxaliplatin) prior to Cycle 6, but who have at least stable disease, may be considered for ongoing treatment with single-agent nivolumab on the maintenance phase after discussion with the sponsor-investigator.
This is a randomized phase 2 trial of gemcitabine + carboplatin + nivolumab or gemcitabine + oxaliplatin + nivolumab for the treatment of cisplatin-ineligible patients with metastatic urothelial cancer. Randomization will be stratified on the lymph node only (and/or unresectable primary) metastatic status.