The expression of PD-L1 was correlated with tumor size (P = 0.001), mitotic index (P <0.001), risk grade (P <0.001), CD3+ T cells (P <0.001), CD4+ T cells (P <0.001), CD8+ T cells (P <0.001), Foxp3+ T cells (P <0.001), CD20+ B cells (P = 0.007), CD56+ NK cells (P = 0.010), PD-1 (P <0.001), and CD68+ macrophages (P = 0.027) (Supplementary Table 4). Here, CD4 is linked to neoplasm.