Abstract
Solitary fibrous tumors (SFT) are soft tissue tumors originating primarily in the pleura, and extrapleural occurrence is thought to be rare. A case of SFT that originated in the mesentery of the small intestine is reported.
The patient was a 61-year-old woman who was referred to our hospital for detailed examination and treatment after an abdominal mass was detected by a local physician. Abdominal contrast-enhanced computed tomography (CT) showed a lobulated solid tumor containing small cystic changes within the pelvis. The tumor was hypointense and slightly hyperintense on T1- and T2-weighted magnetic resonance imaging(MRI), respectively. A mesenchymal tumor originating in either the mesentery of the intestines or the small intestinal wall was diagnosed, and the tumor was resected surgically.
Intraoperative findings showed that the tumor originated in the mesentery of the small intestine, with no clear invasion into surrounding organs. Partial resection of the small intestine including the tumor site was performed. Histopathological test results were CD34(+), CD99(+), c-kit(-), and Ki-67 index 10-15%, and an SFT originating in the mesentery of the small intestine was diagnosed.
The patient had an uneventful postoperative course and was discharged on day 10 after surgery. No findings of recurrence have been observed as of 31 months postoperatively.
