A Case of Intra-abdominal Desmoid Tumor Located in the Mesentery of the Transverse Colon

Recently we experienced a case of desmoid tumor which had grown in the mesentery of the transverse colon.The patient was 38 years old, and with the chief complaint of an intra abdominal mass. The solid tumor wasrecognized beside of the transverse colon by computed tomography and echo gram, and laparotomy was performed.The tumor was in the mesentery of the transverse colon, and invaded the ileo-colic artery, the right colic artery, andhe right branch of the middle colic artery. Right hemicolectomy was performed, and the tumor was completelyeliminated with those arteries. The tumor was histologically diagnosed intra-abdominal desmoid tumor. Intra-abdominal desmoid tumor was known to be rare. We examined the clinical details of 31 cases which had beenreported in Japan since 1970. There reported only 5 cases with intra-abdominal desmoid tumor which had nocomplication of Adenomatosis Coli nor laparotomy in ananmnesis. In this case tumor was considered to be derivedfrom the mesentery of the transverse colon, whereas in other 4 cases, they were from the mesentery of smallintestine. It appeared to be the first case in Japanese medical literature.