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. 2020 May 5;26(4):2225–2235. doi: 10.1007/s12253-020-00814-2

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Fig. 2 — a and b: Membranous expression (and rarely cytoplasmic staining not used for scoring) of PD-L1 in tumor cells (magnification 200x) c: PD-L1 expression of tumor associated immune cells (magnification 200x) d: Example of interface pattern. PD-L1-positive immune cells at the interface between carcinoma (top left) and adjacent stroma (magnification 100x)