A study of erdafitinib versus standard of care, consisting of chemotherapy (docetaxel or vinflunine) or anti-PD-(L) 1 agent pembrolizumab, in participants with advanced urothelial cancer and selected FGFR aberrations who have progressed on or after 1 or 2 prior treatments, at least 1 of which includes an anti-PD-(L) 1 agent (cohort 1) or 1 prior treatment not containing an anti-PD-(L) 1 agent (cohort 2). It will consist of screening, treatment phase (from randomization until disease progression, intolerable toxicity, withdrawal of consent or decision by investigator to discontinue treatment, post-treatment follow-up (from end-of-treatment to participants death, withdraws consent, lost to follow-up study completion for the respective cohort, whichever comes first). The study will have long term extension (LTE) period after clinical cutoff date is achieved for final analysis of each cohort and participants eligible in the opinion of the investigator, will continue to benefit from the study intervention. Efficacy, pharmacokinetics, biomarkers, patient reported outcomes, medical resource utilization and safety will be assessed.
