A Resected Case of Omental Undifferentiated Pleomorphic Sarcoma

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  • 2度の再発切除を行い9年生存中の大網原発未分化多形肉腫の1例
  • 症例 2度の再発切除を行い9年生存中の大網原発未分化多形肉腫の1例
  • ショウレイ 2ド ノ サイハツ セツジョ オ オコナイ 9ネン セイゾン チュウ ノ ダイモウ ゲンパツ ミブンカ タケイ ニクシュ ノ 1レイ

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Abstract

A 67-year-old man was admitted with the complaint of a painless mass in the left upper abdomen. Hematological examination revealed a WBC count of 17500/ml and serum CRP of 7.04 mg/dl, indicating the presence of inflammation. Abdominal CT and MRI revealed findings suggestive of an omental tumor or advanced pancreatic body cancer with invasion of the stomach, or a gastrointestinal stromal tumor, however, no definitive diagnosis could be made. Total gastrectomy and pancreatic body and tail resection including the tumor with splenectomy was performed. The final histopathological diagnosis was undifferentiated pleomorphic sarcoma (UPS) of the omentum, the equivalent of inflammatory malignant fibrous histiocytoma (MFH) according to the previous WHO classification. Local recurrences were discovered and resected at 4 years and 8 years after the first operation. Documented cases of omental UPS with a long survival are rare.

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