Furtherly, we analyzed the correlations of KDM2A mRNA and protein expression with clinical features in ccRCC and found that the high expression of KDM2A mRNA was more likely to occur in ccRCC tissues with tumor size > 7 cm (P = 0.005) and T3-T4 stage (P = 0.047) (Table 3). The gene discussed is KDM2A; the disease is nonpapillary renal cell carcinoma.