This study focuses on patients with advanced solid tumors who have specific genetic changes called FGFR gene alterations. The study will test a medication called erdafitinib (also known as JNJ-42756493), which is given as a film-coated tablet that patients take by mouth.
The purpose of this research is to evaluate how well erdafitinib works in treating advanced solid tumors in both adult and pediatric patients (children and teenagers 6 years and older). The study includes patients whose tumors have specific genetic changes in the FGFR genes, which are alterations that can affect how tumors grow and spread.
During the study, participants will receive erdafitinib tablets daily for treatment periods of 21 days. The maximum daily dose is 9 milligrams. Doctors will monitor how the tumors respond to the treatment using specialized imaging techniques to measure any changes in tumor size. The study will track whether tumors shrink completely, partially, or show no response to the treatment.



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