title: Malignant tumor, of the gastrointestinal stromal tumor type, in the greater omentum.
abstract: We report herein a rare case of gastrointestinal stromal tumor (GIST) type, arising from the greater omentum. A 65-year-old man who had a large abdominal tumor was referred to our hospital. Ultrasonography (US) and computed tomography (CT) scans showed a mass occupying almost the entire abdomen anterior to the bowel loops. Abdominal angiography showed that the main feeding artery of the tumor was the right gastroepiploic artery. The preoperative diagnosis was suspected gastric leiomyosarcoma. Laparotomy revealed a large mass arising from the greater omentum, and the tumor seemed to be completely excised. Histopathological and immunohistochemical studies indicated the tumor had the same characteristics as GIST. Twelve months after the operation, the tumor recurred in the peritoneal cavity at the site of the stomach, and was associated with multiple liver metastases. The patient died of hypovolemic shock. Necropsy revealed that rupture of one of the metastatic liver tumors had resulted in a massive intraperitoneal hemorrhage.
authors: Department of Surgery, Tatsuno General Hospital, 3351 Ooaza-Inatomi, Tatsunocho, Kamiina-gun, 399-0426, Nagano, Japan.
authors: Kazufumi
authors: K
authors: Suzuki
authors: Gengo
authors: G
authors: Kaneko
authors: Kouji
authors: K
authors: Kubota
authors: Naoto
authors: N
authors: Horigome
authors: Hitoshi
authors: H
authors: Hikita
authors: Osamu
authors: O
authors: Senga
authors: Makoto
authors: M
authors: Miyakawa
authors: Hisashi
authors: H
authors: Shimojo
authors: Takeshi
authors: T
authors: Uehara
authors: Nobuo
authors: N
authors: Itoh
mesh_terms: D000368:Aged; D015295:Antigens, Tumor-Associated, Carbohydrate; D014408:Biomarkers, Tumor / Q000032:analysis; D002272:Carcinoembryonic Antigen; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007890:Leiomyosarcoma / Q000175:diagnosis / Q000473:pathology*; D008113:Liver Neoplasms / Q000175:diagnosis / Q000556:secondary; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis / Q000473:pathology; D009852:Omentum / Q000000981:diagnostic imaging / Q000473:pathology*; D011860:Radiography, Abdominal; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional
chemical_list: D015295:Antigens, Tumor-Associated, Carbohydrate; D014408:Biomarkers, Tumor; D002272:Carcinoembryonic Antigen