“…While neuroimaging abnormalities in PRES are seen maximally in the white matter of the parietal and occipital regions, lesions can be more extensive, spreading into the cerebellum, frontal regions, basal ganglia, thalami, brain stem and corpus callosum, suggesting a diagnosis of demyelinating disease. 13 Co-existent cortical involvement is common, occurring in up to 94%. 1,14,15 Although abnormalities may be seen on computed tomography (CT) scan, fluidattenuated inversion recovery (FLAIR) MRI sequences are much better at showing the extent of the hyperintense lesions and the degree of cortical involvement.…”