Currently, based on the approval of erdafitinib for the indication of urothelial carcinoma, the FGFR RGQ RT-PCR assay kit (Qiagen) has been approved by the Food and Drug Administration (FDA) for the companion diagnostic testing of FGFR3 point mutations in urothelial carcinoma. The gene discussed is FGFR3; the disease is urothelial carcinoma.