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| Value of MRI features in preoperative diagnosis of malignant meningioma |
| ZHANG Yi-nian, HE Ning, ZHOU Jun-lin, WANG Hong-yan |
| Department of Radiology, the Second Hospital of Lanzhou University, Lanzhou 730030, China |
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Abstract Objective: To investigate the value of MRI features in preoperative diagnosis of malignant meningioma. Methods: MRI findings in 23 patients with malignant meningioma were analyzed retrospectively, and 34 cases of benign meningiomas in the same period were randomly selected as control. Results: Lobulation, cystic necrosis, tumor-brain interface, tumor-brain interface rim, signal intensity in T1WI, signal inhomogeneity, inhomogeneous contrast enhancement, the degree of contrast enhancement and dural tail sign are related to the gradings of meningioma. Conclusion: Malignant meningiomas do have characteristic MRI features, to evaluate some MRI features has important significance in qualitative diagnosing malignant meningioma before operation.
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Received: 25 June 2007
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2007, Vol. 18 
