The expression of CCR2 is negatively associated with tumor purity (r = −0.296, P = 2.32e-7), but positively related to infiltrating levels of B cell (r = 0.619, P = 5.60e-32), CD4 + T cell (r = 0.566, P = 4.48e-26), CD8 + T cell (r = 0.376, P = 3.65e-11), Macrophage (r = 0.402, P = 9.30e-13), Neutrophil (r = 0.481, P = 2.12e-18), and Dendritic cell (r = 0.565, P = 5.13e-26) (Figure 10(a)). This evidence concerns the gene CD4 and neoplasm.