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(A) Lymphoepithelioma-like carcinoma with dense lymphocytic infiltration and a pushing margin. Lymphocytes outnumber tumor cells (H&E stain, ×4). (B) Photomicrograph of Epstein-Barr virus-encoded RNA as determined by in situ hybridization (×4). Only tumor cell nuclei are positive for staining, whereas lymphocytes are negative.
