The univariate Cox regression analysis shown in Table 1, IL2RG expression level (HR = 1.484, 95%CI = 1.097–2.009, p = 0.011), EFNA3 expression level (HR = 1.569, 95%CI = 1.116–2.122, p = 0.003), and MTCP1 expression level (HR = 1.847, 95%CI = 1.361–2.506, p < 0.001) showed a strong correlation with the patients' overall survival time in ccRCC (p < 0.05). This evidence concerns the gene EFNA3 and nonpapillary renal cell carcinoma.