CXCR4 and nonpapillary renal cell carcinoma: Finally, CXCR4 (Cor = 0.255, p < 2.2e-16) and CCR10 (Cor = 0.228, p < 2.2e-16) were top two immune receptors positively correlated with A2M in ccRCC (Figure 6F1-F2).