Further, in the ccRCC group, we detected a positive correlation between CBX4 and CBX8 (ρ = 0.53, p = 3.20−27), and a negative correlation between CBX3 and CBX7 (ρ = −0.41, p = 1.43−15). The gene discussed is CBX4; the disease is nonpapillary renal cell carcinoma.