Extensive bilateral cerebral supra- and infra-tentorial deep white matter demyelinating foci, with predominantly peri-ventricular location, are seen, they demonstrate low T1 and high T2 / FLAIR signal.
Some of these foci show restricted diffusion with marginal enhancement showing typically incomplete ring. Similar demyelinating foci are seen within the cerebellar hemispheres, pons and middle cerebellar peduncles.