[A patient with epilepsy presenting developmental regression after seizures--consideration of the mechanism from the findings of CT-scan and SPECT].

We report a 6-month-old female infant with frequent brief seizures who subsequently showed developmental regression. CT-scans right after her seizures revealed enlargement of bilateral subdural space more on the right side with an evidence to suggest destruction of the blood brain barrier in enhanced CT-scan, CT-scan, one month after the onset, showed diffuse brain atrophy. 123I-SPECT, which was performed 11 days after cessation of her seizures, still showed diffuse hypoperfusion predominantly in the right temporal area, and it returned to normal 3 months after the onset. We discussed the mechanisms of developmental regression in this case from the neuroradiological findings.