PDK4 and nonpapillary renal cell carcinoma: Overall survival analysis of risk scoring genes revealed that ccRCC patients with high expression of FLRT3, ATP1A1, PDK4, and KCNJ15 presented better prognosis, but patients with high SAA expression presented worse prognosis (Supplementary Figure 5), which was consistent with the positive and negative risk coefficients in the risk scoring model.