1 & 2: Axial T2WIs of the posterior fossa show patchy white matter hyperintensity
surrounding the fourth ventricle involving the brain stem and cerebellum bilaterally.
3: Axial T2WI at midbrain level shows involvement of the midbrain, particular on the right.
4: Axial T1WI with gadolinium at the level of pons shows enhancing white matter lesions
in the cerebellum.
Key words: mri inflammation infection demyelinating
Post Infectious encephalitis