Sagittal (above left), axial (above right) and coronal (below left) T1 MRI without contrast of the brain shows a round lesion centered in the vermis of the cerebellum that is displacing the fourth ventricle to the left. The lesion has hypointense thickened cerebellar folia giving it a striated appearance. The cerebellar folia are hyperintense on the axial T2 MRI (below). The lesion did not enhance.
