PRIMARY MALIGNANT FIBROUS HISTIOCYTOMA OF THE SIGMOID COLON-REPORT OF A CASE-

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  • Ｓ状結腸原発悪性線維性組織球腫の１例

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Abstract

We herein report a case of colonic occlusion caused by malignant fibrous histiocytoma (MFH) arising from the sigmoid colon. A 55-year-old woman presented to our hospital with a loss of weight and flatulence of the hypogastrium. Abdominal pain film showed the finding of bowel occlusion and computed tomography showed a large soft-tissue mass in the sigmoid colon. Gastrografin enema and endoscopic examination showed a tumor in the sigmoid colon causing almost complete obstruction. After decompression by using a transanal decompression tube for a few days, we performed a high anterior resection with enbloc lymph node dissection. The resected specimen contained a tumor measuring 7×16×8.5cm, and the surgical margin was free of cancer. Based on histological and immunohistochemical studies, the tumor was diagnosed as MFH of the sigmoid colon. Colorectal MFH is extremely rare, and to our knowledge, only 22 cases, including our case, have been reported in the world's medical literature so far. In our case, a complete resection was performed and no adjuvant chemotherapy was administered. No clinical signs of local recurrence or distant metastasis were found at five months after the operation.

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