Status epilepticus in a 2-year-old girl.
A, Coronal FLAIR image shows diffuse hyperintense lesions in the left hemisphere including the left thalamus, cingulate gyrus, and hippocampus.
B and C, DW images show these lesions as hyperintense with decreased ADC. They represent cytotoxic edema due to excitotoxic injury mediated by neuronal seizure activity. These lesions were partially reversed on follow-up MR imaging (not shown).