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Transient restricted diffusion of whole corpus callosum and symmetrical white matter in epilepsy.

A 31-year-old man with a 10-year history of epilepsy developed complex partial seizure. Urgent brain diffusionweighted images (DWI) showed marked hyperintensity in the entire corpus callosum [apparent diffusion coefficient (ADC) =0.14×10 mm/s] and in the symmetric peripheral fronto-parietal white matter (ADC=0.13×10 mm/s) without enhancement (Picture 1). EEG showed sharp waves over both frontal regions. On the 15th hospital day, DWI lesions