42 year-old with headache



        
CT noncontrast soft tissue window                                                                                  CT noncontrast bone window



         
T1 axial noncontrast                                                                                                           T1 axial post gad




Findings:

Hyperdense mass with hyperostosis on NECT
Homogeneously enhancing extra-axial dural based mass
Cortical buckling and trapped cortical vessels


DDX:

Dural metastasis
Granuloma (Sarcoid, TB)
Hemangiopericytoma
Solitary fibrous tumor
 



Diagnosis:

Meningioma

Discussion:

Arise from arachnoid meningothelial “cap” cells
Most common primary adult intracranial tumor
F>M; may be related to female sex hormones
XRT pre-disposes
Associated with NF-2
Dural based mass with cortical buckling and/or trapped CSF clefts/cortical vessels
Hyperostosis of bone; Calcifications
MRS: elevated levels of alanine at short TE



Submitted by Sung Logerfo, MD, UW Neuroradiology

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