MRI Diagnosis of Malignant Meningioma / 实用放射学杂志

ABSTRACT

Objective To investigate MRI features of malignant meningioma,in order to improve diagnostic rate of the disease preoperatively.Methods 18 cases with intact MRI materials proved operatively and pathologically were collected.Results Most tumors showed heterogeneous and low signal intensity on T 1WI,(16/18 cases),and heterogeneous and high signal intensity on T 2WI,(14/18cases). 15 of 18 cases showed significant but inhomogeneous contrast enhancement.The tumors were irregular or lobulated in contour with all or part of the border ill-defined. Conclusion Malignant meningiomas do have characteristic MRI features besides in common with benign ones.