A Case of Resected Primary Jejunal Mesenteric Carcinoid Tumor

Abstract

A 59-year-old man with a complaint of diarrhea was found to have an intra-abdominal mass on computed tomography (CT). The mass was about 8 cm in size and located adjacent to the jejunum. Fluorodeoxyglucose-positron emission tomography (FDG-PET) showed irregular uptake areas only in the mass. On contrast ileography, there was no tumor or stenosis in the small intestine. On upper and lower gastrointestinal endoscopy, there was no tumor or stenosis. With a probable diagnosis of a sarcomatous lesion of the jejunum or an unknown primary, laparotomy was performed. At laparotomy, a tumor was present in the jejunal mesentery near the ligament of Treitz. Partial jejunectomy with combined resection of the mesentery was performed. Histopathologically, the tumor was diagnosed as a carcinoid tumor. No other carcinoid tumor was found in the abdomen. Therefore, the tumor was diagnosed as a primary jejunal mesentery carcinoid tumor. This rare case is reported together with a review of the literature.