Abstract
A 43-year-old male was admitted to our hospital for vomiting and melena with a hemoglobin level of 12 g/dL. Abdominal enhanced-computed tomography revealed a tumor (8 cm in diameter) in the pelvis that was fed from the left gastroepiploic and superior mesenteric arteries. Esophagogastroduodenoscopy and colonoscopy showed no abnormal findings. We performed a laparotomy for the intrapelvic tumor with melena on the 20th hospital day because the patient passed a large amount of bloody stool again on the 14th hospital day. Intraoperative findings revealed a large jejunal tumor covered by the omentum, and we performed a partial resection of the jejunum. The postoperative course was uneventful. The tumor appeared to be well circumscribed, and the mucosal surface was ulcerated. Pathological findings showed mitotic spindle tumor cells arranged in a palisade pattern making up the tumor between the submucosal and subserosal layers. Immunohistochemical findings showed positive staining for KIT and CD34, and a jejunal gastrointestinal stromal tumor was diagnosed.
