The overall survival analysis showed that ccRCC patients with high expression levels of AURKB (P = 0.000), CCNA2 (P = 0.000), TPX2 (P = 0.000), and NCAPG (P = 0.000) had poorer overall survival times than those with low expression levels (Figure 14). Here, CCNA2 is linked to nonpapillary renal cell carcinoma.