MRI diagnosis and differential diagnosis of malignant meningioma

Objective To study the MRI features of malignant meningioma.Meth od s The MRI findings of 23 cases with malignant meningioma were analyzed, and corr elated with operation and pathology. Results The tumor yielded iso-or hypo-int ensity on T1-weighted images, homogenous or non-homogenous hyper-intensity on T2-weighted images. Irregular enhancement was revealed as well. Malignant meni ngioma had irregular, mushroom pattern margin, dura matter involvement, severe c erebral edema and in some cases, extra-cranial involvement.Conclusion Diagnosti c findings of malignant meningioma could be found on MRI, while it is essential to differentiate a malignant meningioma from a benign one, or a malignant glioma and meningeal metastases.