We further found that the expression of CDK1 was upregulated in renal clear cell carcinoma compared with normal tissue (Figure 4(c)), and the expression of NCAPG was associated tightly with overall survival and disease-free survival in renal clear cell carcinoma (Figure 4(d)), which was consistent with the results of NCAPG. This evidence concerns the gene NCAPG and clear cell renal carcinoma.