Metastatic Carcinoma Occurring in a Gastric Hyperplastic Polyp Mimicking Primary Gastric Cancer: The First Reported Case

Figure 1

(a) Endoscopic view of gastric polyp. (b) Low power microscopic view of the excised lesion showing typical features of gastric hyperplastic polyp, namely, elongated, tortuous, and cystic foveolae separated by edematous and inflamed stroma (hematoxylin and eosin stained section, magnification 20). (c) High power view shows carcinoma cells, including signet ring cells, infiltrating the lamina propria among benign gastric foveolae (hematoxylin and eosin stained section, magnification 400). (d) Estrogen receptors and (e) GATA3 strongly stain the nuclei of the cancer cells while the gastric epithelial cells remain negative for both markers ((d) and (e) magnification 200).

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