Meningioma

Unknown Brain Case 7


Presentation

68 y/o man with headache.

Image Findings

A large, meningeal-based mass is seen in the right frontal lobe that is bright on T2-weighted images and dark on T1-weighted images. With Gadolinium, marked homogeneous enhancement is seen in the mass. The T2-weighted images also show a large amount of surrounding edema.

Differential Diagnosis

Discussion

Meningiomas are the most common intracranial, extraaxial tumors. About half occur along the convexity or falx cerebri, as does this one. Less common sites are the sphenoid ridge, olfactory groove, parasellar, and posterior fossa. Meningiomas are usually incidental findings on MRI.
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Last modified April 27, 1995
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