FLT4 and nonpapillary renal cell carcinoma: Prognostic network maps of VMRGs unveiled ZEB1, FLT1, EDNRB, EDN1, FLT4, PRDX2, KDR, SEMA4D, NOTCH4, DLL4, CDH5, EPHA2, MAPK1, MAPK3, and NOTCH1 as protective factors in ccRCC.