FGFR3 and renal pelvis/ureter urothelial carcinoma: Since UTUC metachronous MIBC has higher FGFR3 expression compared with primary bladder MIBC, it suggests that MIBC following UTUC may take over FGFR3 expression from UTUC tumor origin, which may have resulted in favorable survival outcomes with additional RC compared to that of bladder primary MIBC.