MAD2L1 and nonpapillary renal cell carcinoma: Survival analysis showed that 8 genes (RHOA, CASP3, MAD2L1, PLCG1, CHEK1, FBXW7, RAN and DDX55) and 11 genes (NCL, FMR1, AGO1, DDX3X, SUPT16H, CBL, RB1, CALM1, NUP155, CTCF and UBXN7) indicated poor and good prognosis in ccRCC patients, respectively.