ITPKA and nonpapillary renal cell carcinoma: Multivariate Cox regression analysis showed that 11 of the 12 genes, namely, NOS1, ALAD, ALDH3B2, ACADM, ITPKA, IMPDH1, SCD5, FADS2, ACHE, CA4, and HK3 independently predicted prognosis of ccRCC patients.