<prompt> Focal bilateral thalamic, posterior internal capsule showing hyperdensity and calcification in CT scan and extensive involvement of deep white matter is characteristic ofAlexanders diseaseMetachromatic leukodystrophyKrabbes diseaseMultiple sclerosis  <response>: Krabbes disease globoid leukodystrophy.Other features :Hypodensity on T2 MRI.Involve cerebellar white matter. 