Abstract
A 79-year-old woman with a medical history of type 2 diabetes, hypertension, and chronic heart and kidney failure was admitted to the hospital because of cholangitis. She underwent ERCP, which incidentally showed a 25 × 10 mm pedunculated polyp with eroded tip located on the greater gastric curvature (Paris endoscopic classification of polyps 0-Ip) (A, B). Subsequent gastroscopy showed atrophic antral gastritis. The polyp was electroresected. Histologic analysis indentified a mixed neuroendocrine-noneuroendocrine neoplasm (MiNEN) composed of neuroendocrine tumor and tubular adenoma (MANET), with growth in the deeper part of the mucosa and submucosa.
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