Fig. 3From: PD-L1 and PD-L2 expression in the tumor microenvironment including peritumoral tissue in primary central nervous system lymphomaPD-L2 expression on tumor cells and macrophages in tumor tissue and peritumoral tissue. Tumor cells expressed PD-L2 (a: none; b: strong), and macrophages expressed PD-L2 in both tumor tissue (c: none; d: weak; e: moderate; f: strong) and peritumoral tissue (g: none; h: weak; i: moderate; j: strong) (magnification × 200)Back to article page