A Case of Primary Lipoma Arising from Transverse Mesocolon

Riki Okita, Shuji Saeki, Hidenori Mukaida, Kazushi Hisamatsu, Naoki Hirabayashi, Akira Kameda, Wataru Takiyama, Yuzo Hayashi¹⁾ and Yoshiro Tachiyama¹⁾

Department of Surgery and Department of Pathology¹⁾, Hiroshima City Asa Hospital

A 45-year-old man was admitted to hospital after undergoing a medical checkup. An abdominal US examination had shown a tumor in his upper abdominal cavity. On physical examination, the tumor was not palpable, but an abdominal CT scan and a MRI examination revealed a giant tumor in his upper abdominal cavity with the same density and intensity as fatty tissue. These findings suggested a lipoma or a liposarcoma of the retroperitoneum or mesenterium. After examination, the tumor was surgically removed. The tumor was located in the transverse mesocolon, and no invasion to the surrounding tissue was seen. Histology findings confirmed a diagnosis of lipoma. Mesenteric lipomas are rare, and only 16 cases have been reported in Japan. Some cases of diagnosed retroperitoneal lipoma recurred or metastasized. We plan to closely follow-up this case.

Key words
mesenteric tumor, mesenteric lipoma, giant lipoma

Reprint requests
Riki Okita Department of Surgery, National Shikoku Cancer Center
13 Horinouchi, Matsuyama 790-0007 JAPAN

Accepted
July 23, 2003

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