A Study of Erdafitinib in Participants With Advanced Solid Tumors and Fibroblast Growth Factor Receptor (FGFR) Gene Alterations

Erdafitinib is a selective and potent pan FGFR 1-4 inhibitor with demonstrated clinical activity in participants with metastatic urothelial cancer and cholangiocarcinoma identified to have alterations in the FGFR pathway. This study targets the underlying altered biology of FGFR-driven tumors irrespective of solid tumor histology subtype. The study consists of screening phase, treatment phase and the post treatment follow-up phase (from the end of treatment visit until the participant has died, withdraws consent, is lost to follow-up, or the end of study, whichever comes first). End of study is considered as the time when the last participant receives the last dose of study drug on the study and either all pediatric participants are off study or until the most recently enrolled pediatric participant still participating in the study has 6 months of follow-up, whichever occurs first. Currently this study is recruiting pediatric participants only.