腸間膜原発脂肪肉腫の１例

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  • A CASE OF LIPOSARCOMA ARISEN IN THE MESENTERY

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Liposarcoma commonly occurs in the lower extremities and retroperitoneum, and rarely in the mesentery. This time we experienced a case of liposarcoma arisen in the mesentery.<br>A 42-year-old man was seen at the hospital because of abnormal defecation and abdominal distension. On physical examinations, an elastic-hard, movable and infant's head-sized tumor with tenderness was palpated in the lower abdomen. Abdominal ultrasonography showed a 14×11×7cm cystic tumor with septum and a solid part in the pelvis. Angiography visualized development and expansion of the superior mesenteric artery and vein, but no accumulation of contrast material was seen. After admission abdominal pain occurred and abdominal CT scan revealed an enlargement of the tumor and an area of hyper absorption. Intracystic bleeding was diagnosed and an emergency operation was performed. The tumor which was reddish brown in color and was filled with clots was present in the ileocolic msentery, mainly involving the ileocecum. The tumor was well movable and was easily dissected from the retroperitoneum. An excision of the tumor and an ileocolic resection were carried out, resulting in complete removal of the tumor. Histopathological diagnosis was highly malignant and dedifferentiated liposarcoma with a part showing differentiation to fibroblast. The patient has been well without recurrence, as of 1 year 9 months after the operation.

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