Evaluation of PD-L1 Expression in Tumor Tissue of Patients with Lung Carcinoma and Correlation with Clinical and Demographic Data

Figure 1

Photomicrographs of PD-L1 immunohistochemical expression in lung cancer tumor cells (magnification/scale bar: 400x/50μ). (a) Absence of PD-L1 expression; (b) negative PD-L1 expression (<5% of stained cells); (c) positive PD-L1 expression (≥5% stained cells); (d) Positive Control with placental tissue. Arrows show positive staining cells.

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