Abstract
A 60-year-old woman was examined, and screened with upper gastrointestinal endoscopy. The endoscopic findings showed multiple epithelial tumor lesions, each measuring around 0.5 to 2 cm in diameter, located in the second portion of the patient's duodenum. A single-balloon enteroscopy was performed to search for other lesions in the small intestine, revealing a small, centrally depressed epithelial tumor lesion, measuring about 1 cm in diameter, in the jejunum. Although these epithelial tumor lesions were pathologically diagnosed as adenoma by each biopsy specimen, a pancreatoduodenectomy and a partial jejunectomy were performed for these duodenal and jejunal tumor lesions. Pathologically, the jejunal lesion was a well differentiated tubular adenocarcinoma, measuring 6 mm long and 5 mm in diameter, and remained in the jejunal mucosal layer. This case seemed to be notable because, so far, cases of jejunal carcinoma with a diameter smaller than 10 mm have almost never been reported in Japan.
