Fig. 3
Pathologic findings of the biopsied gastric tissue. a The adenocarcinoma showing fused glands was intermingled with inflammatory exudates and normal mucosal glands (hematoxylin and eosin, original magnification ×100). b Immunohistochemistry of PD1 reveals completely negative staining in tumor cells (immunohistochemistry, original magnification ×200). c Tumor cells showing cytoplasmic positivity for PDL1 immunostaining (immunohistochemistry, original magnification ×200)