ZENG Jun-jie1, XING Wu2, HAN Zai-de2, ZHONG Xu1, WAN Jun2
1. Gansu Traditional Medical College, Lanzhou 730000, China;2. Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
Abstract：Objective: To investigate the MR features of meningioma in atypical location． Methods： The MR features were analyzed retrospectively in 32 cases of meningioma in atypical location(lateral ventricular, brain, cerebellum, cistern, pineal region, orbit, jugular foramen region, paranasal sinus) proved by operation and pathology． Non-enhanced and contrast enhanced MR scanning were performed in all cases. Results: Malignant meningioma was found in 4 cases, benign in 28 cases; multiple meningiomas in 2 cases, single lesion in 30 cases(intra- extracranial communication meningioma in 2 cases). The MR imaging feature of atypical location meningioma showed intraparenchymal tumor; homogeneous isointense or slightly hyperintense or slightly hypointense signal on T1WI and T2WI; the shapes of mass were round, round-like or lobulated, homogeneous enhancement or target ring sign were found on Gd-DTPA enhanced MR scanning. Conclusion: Meningioma has certain imaging characteristics, when combined with clinical data, most of the atypical location meningioma can be made qualitative diagnosis, and have a certain degree of significance in guiding the selection of the mode of surgical operation.
2010, Vol. 21 
