CD4 and neoplasm: EZH2 expression was significantly and positively correlated with tumor purity (r = 0.177, p = 9.73 × 10−4), as well as with the infiltration levels of various immune cells, including B cells (r = 0.474, p = 1.24 × 10−20), CD8+ T cells (r = 0.284, p = 9.3 × 10−8), CD4+ T cells (r = 0.378, p = 3.84 × 10−13), macrophages (r = 0.436, p = 3.22 × 10−17), neutrophils (r = 0.374, p = 7.02 × 10−13), and dendritic cells (DCs; r = 0.453, p = 1.38 × 10−18) (Figure 1D).