PPARGC1A and nonpapillary renal cell carcinoma: As shown in Table 2, multivariate Cox analysis showed that poor PFS and OS were significantly associated with pT stage (ref. T1-T2), pN stage (ref. N0), pM stage (ref. M0), AJCC stage (ref. I-II), ISUP grade (ref. 1-2) and gene (MLXIPL or PPARGC1A) expression (ref. low) for ccRCC patients of FUSCC cohort (p<0.05).