Related Experiment Video
Updated: Mar 12, 2026
Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids
Published on: October 14, 2019
Pedunculated gastric neuroendocrine tumor: a case report
Kenichi Takeda1, Shin-Ei Kudo2, Fumio Ishida2
1Digestive Disease Center, Showa University Northern Yokohama Hospital; Department of Gastroenterological Medicine, Kakunodate Municipal Hospital.
Abstract:
Background and study aims: Gastric neuroendocrine tumors (NETs) are rare lesions that develop from neuroendocrine cells. NETs are classified into 3 types based on the rate of mitosis and Ki-67 labeling index; the NET G1 type is synonymously referred to as carcinoid. Gastric NETs are usually discovered as submucosal tumors during upper gastrointestinal endoscopic examination. This study reports a rare case of pedunculated gastric NET. The lesion was found as a result of gastroendoscopy. The gastric lesion was a pedunculated polyp with a reddish head. We performed endoscopic submucosal dissection and an en-bloc resection of the gastric lesion. The resected specimen was evaluated histopathologically and diagnosed as a carcinoid (NET G1).
