Abstract
Leiomyomas of the mesentery are rare. We present a case of a leiomyoma of the mesentery of the transverse colon which was incidentally detected by preoperative examination for prostate cancer and was diagnosed by histopathologically. The case involved a 62-year-old man who was asymptomatic and was pointed out a 12-cm diameter tumor with remarkable calcification in the left lower quadrant of abdomen on an abdominal CT scan performed as a preoperative examination for prostate cancer. FDG-PET revealed a mild degree of abnormal uptake of FDG with the SUV max of 3.4 in the tumor. A low grade malignant tumor of the mesentery of the transverse colon was likely and it was removed. The tumor had arisen from the transverse colon mesentery but it was closely adjacent to the intestine, so that it was difficult to preserve the surrounding arteries. The tumor was then resected together with the transverse colon. The histopathological as well as immunohistochemical diagnosis was leiomyoma of the transverse colon mesentery.
This case is reported here with a review of the literature because leiomyoma of the mesentery in which abnormal uptake of FDG was demonstrated in FDG-PET is considered rare.
