Cystic meningioma. A, Axial postcontrast Tl -weighted image reveals a cystic mass lesion involving the left frontal lobe with peripheral enhancement, as well as enhancement around a trapped CSF intensity collection laterally (white arrow). B, Axial postcontrast Tl -weighted image near vertex of the head demonstrates the extra-axial nature of the mass with associated dural attachment (white arrow). (Click to magnify figure)http://yassermetwally.wordpress.com/brain-tumors/adult-brain-tumors/
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