ABSTRACT
The fibromatosis is a broad group of benign fibrous tissue proliferations of similar microscopic appearance that are intermediate in their biological behavior between benign fibrous lesions and fibrosarcoma. Although various series have been reported of abdominal wall and extra-abdominal desmoid tumors, intra-abdominal desoids are extremely rare. We experienced a case with mesenteric fibroma-tosis occuring in a 30 year-old male. He was admitted to the Kangbuk Samsung hospital complaining of right lower quadrant abdominal mass and abdominal bloating sense. Utrasonography and computed tomography of the abdomen showed a solid mass in the left abdomen surrounded by loops of small bowel. At explorative laparotomy, there was a hard, well circumscribed round mass (25 X 15 X 12 cm) in the mesentery of the terminal ilem. After the tumor was dissected from the retro-peritoneum and surrounding tissues, segmental re- section of ileum with end-to-end anastomosis was performed. On the histopathologic examination, it was confirmed as mesenteric fibromatosis. A brief review of the literature on mesentery fibromatosis was done.