Fig. 2From: PD-L1 and PD-L2 expression in the tumor microenvironment including peritumoral tissue in primary central nervous system lymphomaPD-L1 expression on tumor cells and macrophages in tumor tissue and peritumoral tissue. Tumor cells expressed PD-L1 (a: none; b: moderate; c: strong), and macrophages expressed PD-L1 in both tumor tissue (d: none; e: weak; f: moderate; g: strong) and peritumoral tissue (h: none; i: weak; j: moderate; k: strong) (magnification × 200)Back to article page