Fig. 1
From: Classification of gallbladder cancer by assessment of CD8+ TIL and PD-L1 expression
Expression of PD-L1 by gallbladder cancer (GBC) (× 200 magnification). Representative examples are shown of programmed death-ligand 1 (PD-L1) immunohistochemical staining of samples that are PD-L1-positive only in tumor cells (PD-L1+ TCs, a), PD-L1-positive only in immune stroma (PD-L1+ IS, b) and positive for PD-L1 expression (PD-L1+, c)