Mesenteric Fat Necrosis Mimicking Liposarcoma—Report of a Case—

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  • KIKUCHI Nozomi
    Department of Surgery, Jichi Medical University, Saitama Medical Center
  • NODA Hiroshi
    Department of Surgery, Jichi Medical University, Saitama Medical Center
  • SUZUKI Kojiro
    Department of Surgery, Jichi Medical University, Saitama Medical Center
  • ENDO Yuhei
    Department of Surgery, Jichi Medical University, Saitama Medical Center
  • WATANABE Fumiaki
    Department of Surgery, Jichi Medical University, Saitama Medical Center
  • RIKIYAMA Toshiki
    Department of Surgery, Jichi Medical University, Saitama Medical Center

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Other Title
  • 腫瘤像を呈した腸間膜脂肪壊死の1例
  • 症例 腫瘤像を呈した腸間膜脂肪壊死の1例
  • ショウレイ シュリュウゾウ オ テイシタ チョウ カンマク シボウ エシ ノ 1レイ

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Abstract

A 59-year-old woman was referred to our hospital for the evaluation of an abdominal mass. CT revealed a non-enhancing encapsulated heterogeneous tumor measuring 45 mm in diameter, close to the pancreas. MRI revealed an admixture of high and low signal intensities on T1WI/T2WI, and low signal intensities on fat-suppressed T1WI. Under the tentative diagnosis of liposarcoma, we performed resection of the mass. Intraoperatively, the tumor was found to originate from the gastrocolic ligament, with no evidence of invasion of the surrounding tissues. Histopathology revealed the diagnosis of encapsulated fat necrosis. Since the operation 19 months ago, the patient remains well, with no evidence of recurrence. It is difficult to distinguish fat necrosis from a liposarcoma based on the radiological findings alone. In patients with an abdominal mass harboring a fat component presenting with a history suggestive of intraabdomimal inflammation, the possibility of fat necrosis should be borne in mind.

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