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Pathology images of the gastric malignancy. (A) H&E-stained histologic sections reveal a poorly differentiated carcinoma with rare poorly-formed glands and a dense lymphoid infiltrate. (B) In-situ hybridization shows patchy nuclear EBV-positivity in the tumor. (C) Immunohistochemistry for PDL-1 demonstrates strong membranous staining of tumor cells and immune cells (CPS of 40).
