Dose Escalation, Expansion Study of Vofatamab (B-701) in Treatment of Locally Advanced or Metastatic Urothelial Cell Carcinoma

This is a Phase 1/2(b), sequential, dose escalation, open-label, randomized expansion, multicenter, efficacy and safety study of vofatamab alone or in combination with docetaxel, or versus docetaxel in FGFR3 mutant/fusion subjects with Stage IV, locally advanced or metastatic UCC who have relapsed after, or are refractory to at least one prior line of chemotherapy. Vofatamab is a novel monoclonal antibody specific for fibroblast growth factor receptor 3 (FGFR3) that is being developed to target FGFR3-positive tumors. This study is divided into 3 phases: Phase 1b (Cohort 1), Phase 2 (Cohorts 2 and 3), and Phase 2b (Monotherapy Expansion Phase and Randomized Phase).