Abstract：Objective: To analyse MRI features of intracranial hemangiopericytomas and angiomatous type meningioma， and correlate with their pathology. Materials and Methods: Ninteen cases of intracranial hemangiopericytomas and 25 cases angiomatous type meningioma were verified by pathology. MRI with and without contrast medium were performed in all 44 cases. Results: All patients were of extraaxial tumors. Fifteen of the 19 cases were heterogeneous in intensity isointense to cortical gray matter in 4 cases on T1WI; 15 of 19 cases were heterogeneously iso-hyperintense signal and the other 4 cases were isointense on T2WI. Fourteen of the 19 cases were heterogeneously enhanced on contrast-enhanced T1WI. Conclusion: Intracranial hemangiopericytomas is similar to meningiomas on MRI, but they can be distinguished according to MRI features of intracranial hemangiopericytomas: multiobulated, rich in vascular flow in the tumor, heterogeneous signal intensity, hyperostosis and no intratumoral calcification, the tumor used to have adjacent bone destruction.
2006, Vol. 17 
