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Patient 2. (A) A pedunculated adenoma, about 4 cm in diameter was found in a 24-year-old male patient with familial adenomatous polyposis. The lesion has a lobular, pale yellow surface and arises from a background of cystic fundic gland polyps in the gastric body. (B) A photomicrograph of the same polyp showing an adenoma with low grade dysplasia associated with an underlying cystic fundic gland polyp (H&E stain, magnification × 100).
