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(A) Noncontrast CT shows an extra-axial mass with a low-density CSF cleft (arrow) between the mass and adjacent right frontal lobe. (B) MRI T2-weighted image shows an intermediate signal mass with a CSF cleft (arrow). Gadolinium-enhanced MRI in (C) axial and (D) coronal planes demonstrates avid enhancement within the mass and a dural tail sign (arrowhead).
