Surgical pathology of gastric and duodenal neuroendocrine tumors masquerading clinically as common polyps.
We report 12 cases of silent neuroendocrine neoplasms of the stomach and proximal duodenum masquerading clinically as common polyps. Five lesions were in the stomach, while seven were in the duodenum. Excision by endoscopic polypectomy usually did not remove all neoplastic tissue. The prognosis of these lesions is good even when the tumors are incompletely resected, although bleeding and secretory-product-related morbidity may precipitate surgery. Morphologic features by light or electron microscopy were not predictive of any given secretory product(s).
D000328:Adult; D000368:Aged; D002276:Carcinoid Tumor / Q000473:pathology; D003937:Diagnosis, Differential; D004379:Duodenal Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011127:Polyps / Q000473:pathology*; D013274:Stomach Neoplasms / Q000473:pathology*