Table 2.

MRI findings for meningiomas and metastatic dural tumors.

Imaging Modality	Metastatic dural lesions	Meningiomas
Noncontrast MRI (T1)	Hypointense areas on T1-weighted images	Hypo- or isointense on T1-weighted images
Noncontrast MRI (T2)	Hyperintense areas on T2-weighted images	Variable signal intensity on T2- weighted images; Typically isointensity or slightly hyperintensity
MRI with gadolinium-DTPA contrast (T1)	Distinctly hyperintense lesion Enhancement of a dural tail Best imaging modality	Intense homogeneous or heterogeneous enhancement Well-defined margin
MRI (additional findings)	Dural tail sign is a possibility	Dural tail sign Star-burst sign CSF cleft