Close
Thinning of the brainstem (mainly pons and medulla oblongata) with prominence of the prepontine cistern and fourth ventricle. The hot cross bun sign is present in the pons on T2-weighted images.
Diffuse widening of folia in both cerebellar hemispheres and the vermis, and thinning of both middle cerebellar peduncles. Widened subarachnoid spaces and sulci in both cerebral hemispheres.