Fig. 4: Immunohistochemical aspects including density and distribution of PD-L1.
From: Programmed death-ligand 1 expression in the immune compartment of colon carcinoma
Immunohistochemistry showing PD-L1 high (A) and PD-L1 low (B) colon carcinoma. The PD-L1 high cases showed diffuse staining in the immune compartment at the tumor stromal interface (A). The PD-L1 low cases were either entirely negative as seen in panel B, or showed rare pockets of positive immune cells.
