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Ductal adenocarcinoma. (A) Lower power H&E photomicrograph of ductal adenocarcinoma show invasive pattern. (B) High power shows comedo-type necrosis, pleomorphic nuclei and mitotic figures. (C) High power strong, membranous staining for Her2. (Immunoperoxidase with anti-Her2 antibody, hematoxylin counterstain.).
