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Histological types of gastric cancer according to the Lauren classification. (A,B): Intestinal type. Normal gastric mucosa and tumor nests with intestinal adenocarcinoma morphology are observed ((A), 100×; (B), 400×). (C,D): Diffuse type. There is diffuse infiltration of tumor cells, some with signet ring cell appearance ((C), 100×; (D), 400×). Hematoxylin-eosin.
