Fig. 1

Exemplary figures for PD-L1 and PD-1 staining with corresponding H&E staining. a PD-L1 staining in PDAC tissue. PD-L1 staining was primarily observed on tumor cell membranes. Magnification, 10× objective. b PD-1 staining in PDAC tissue. PD-1 staining was primarily observed in tumor-infiltrating lymphocytes in the tissue. Magnification, 10× objective. Scale bars are equivalent to 100 μm