Abstract：Objective: To investigate CT and MR findings of extrapleural solitary fibrous tumor(ESFT) for imaging diagnosis. Methods: The CT and MR findings of 7 cases with ESFT proved by pathology were retrospectively analyzed. Results: In 7 cases, 3 cases were located in the abdomen(intraabdominal, retroperitoneal and peritoneal respectively), and 1 in nasal cavity and sinuses, 1 in parotid gland, 1 in inguinal region and 1 in bladder respectively. All masses were solitary, four were round or oval, while 3 were irregular. Margins of 5 cases were well defined, while 2 were partly unclear. Diameters of the tumors ranged from 2.0~9.1 cm, and the average tumor size was 6.5 cm. The CT density was homogeneous in 2 cases and heterogeneous in 4 cases. Contrast enhanced CT showed early mild enhancement in 1 case, and obvious enhancement in the arterial and delay phases in 3 cases. On MR, one was hypointense on T1WI and slightly hypointense on T2WI. One was isointense on T1WI and slightly hyperintense on T2WI with strip hypointensity. Conclusion: ESFT can be found in any part of the body. CT and MR findings of ESFT were sometimes characteristic and multiphase contrast enhanced scan can improve the diagnostic accuracy.
2016, Vol. 27 
