PD-L1 Expression Level Displays a Positive Correlation with Immune Response in Pancreatic Cancer

Figure 1

Immunohistochemical staining: (a) negative CD4⁺ T-cell infiltration and (b) positive CD4⁺ T-cell infiltration; (c) negative CD8⁺ T-cell infiltration and (d) positive CD8⁺ T-cell infiltration; (e) negative PD-L1 expression and (f) positive PD-L1 expression; (g) negative FOXP3⁺ Treg cell infiltration and (h) positive FOXP3⁺ Treg cell infiltration. Scale bars represent 50 μm.