Abstract
To define the contribution of the EEG evaluation in children with seizures and Sturge-Weber syndrome, we reviewed EEG data in 14 radiologically confirmed cases. Thirteen exhibited marked voltage attenuation that was localized to the region of the cerebral angiomatosis. Polymorphic slowing occurred ipsilateral to the lesion in six patients and was bilateral in six. By contrast, interictal spikes were evident in only two patients and did not always correlate with the angiomatosis. Seizures were captured in four patients and consistently revealed ictal discharges only at the periphery of the lesion. These findings indicate that abnormalities of EEG background rather than interictal spikes are consistently present early in the course of Sturge-Weber syndrome and correlate with the region of angiomatosis.
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