With the cut-off criteria of ∣log2FC∣ > 1 and P < 0.01, UBE2C, BUB1B, RRM2, and TPX2 were upregulated in 523 ccRCC samples as compared to 72 normal samples (Figure 6(a)). This evidence concerns the gene RRM2 and nonpapillary renal cell carcinoma.