TWO CASES OF PRIMARY LIPOSARCOMA ARISING IN THE MESENTERIUM
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We experienced two cases of liposarcoma arising in the mesenterium. Case 1: A 56-year-old man was admitted to the hospital because of abdominal distension. Computed tomography (CT) and ultrasonography showed a huge tumor in the abdominal cavity which was suspected of liposarcoma. In June, 1979, a laparotomy was performed and revealed that the tumor arose in the small intestinal mesentery and that there were some scattered nodular lesions. The neoplasm was removed with the small intestine. After the first operation, he received three surgical excisions for intraabdominal recurrences. However he died of cardia failure in August, 1989. Case 2: A 61-year-old woman was admitted to the hospital because of vague lower abdominal pain radiating to the left hypochondric region. Abdominal CT showed a high-density lesion located in the mesenterium and magnetic resonance imaging (MRI) of this lesion showed an iso-intensity mass in T1 weighting image and a highintensity mass in T2 weighting image. These findings suggested a soft tissue tumor of mesenteric origin, especially a lipoma or liposarcoma. Laparotomy revealed a yellowish tumor infiltrating into the mesenterium diffusely and this tumor involving the superior mesenteric artery and vein. We gave up radical resection and a partial resection of the tumor was performed to determine its histological diagnosis. Histologically, the tumor showed liposarcoma, well differentiated. The patient recovered uneventfully and was discharged on the 13th postoperative day.
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