TITAN-TCC (0416-ASG) is a Phase 2, open-label study of nivolumab (BMS-936558) monotherapy with additional nivolumab/ipilimumab "boost" cycles in previously untreated and platinum-based pretreated, 2nd and 3rd line, advanced or metastatic transitional cell carcinoma subjects. Nivolumab is a fully human PD-1 antibody which blocks the respective immune checkpoint in a ligand (PD-L1/PD-L2) independent manner.