Teenager who is pregnant with new onset focal neurological deficits and ataxia

MRI of acute disseminated encephalomyelitis
Axial FLAIR MRI without contrast of the brain show multiple lesions in the centrum semiovale, periventricular white matter, splenium of the corpus callosum and white matter of the parietal and occipital lobes. There was no mass effect and no diffusion restriction associated with the lesions. No contrast was given as the patient was pregnant.

The diagnosis was acute disseminated encephalomyelitis.