Well-defined extra-axial infratentorial space-occupying lesion, measuring about 3.5 x 3.6 x 3.8 cm, isointense on T1 and hyperintense on T2 and FLAIR, with intense homogeneous enhancement and dural tail sign on post-contrast T1 sequences. A mass effect is noted on the left cerebellar hemisphere and the 4th ventricle with tonsillar herniation. No significant hydrocephalus.
Axial and coronal T2 show CSF cleft sign indicating extra-axial lesion.