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EEG and seizures in children with hemolytic-uremic syndrome
A Dhuna1, A Pascual-Leone, D Talwar
1Department of Neurology, University of Minnesota, Minneapolis 55455.
Insights
Electroencephalogram (EEG) findings in children with hemolytic-uremic syndrome (HUS)-related seizures varied. While generalized seizures showed diffuse slowing, partial seizures were linked to structural lesions and epilepsy, though burst suppression patterns had good outcomes.
Area of Science:
- Pediatric Neurology
- Nephrology
- Neurophysiology
Background:
- Hemolytic-uremic syndrome (HUS) is a serious condition often associated with neurological complications, including seizures.
- Seizures in HUS can present differently and may have varying prognoses.
Purpose of the Study:
- To analyze electroencephalogram (EEG) findings in children with HUS-associated seizures.
- To correlate EEG patterns with seizure types, neurological deficits, and outcomes.
Main Methods:
- Retrospective review of EEG results from 11 children (ages 1-15) with HUS and seizures.
- Correlation of EEG data with seizure semiology, neuroimaging (CT), and clinical outcomes.
Main Results:
- Four children with generalized tonic-clonic seizures showed diffuse delta slowing on EEG, with complete recovery.
- Seven children with partial seizures often had structural brain lesions and developed epilepsy.
- EEG patterns in partial seizures included focal abnormalities and atypical burst suppression, with favorable outcomes despite the grave prognostic indicator.
Conclusions:
- EEG findings in HUS-associated seizures differ based on seizure type.
- Diffuse slowing suggests a better prognosis than focal abnormalities or burst suppression patterns.
- Despite concerning EEG findings like burst suppression, favorable neurological recovery is possible in HUS-related seizures.
Abstract:
The EEG results of 11 children, ages 1-15 years, who presented with hemolytic-uremic syndrome complicated by seizures 3-10 days after the prodrome were studied. In four children who experienced generalized tonic-clonic seizures, the EEGs demonstrated diffuse delta slowing with no focality. All recovered without neurological deficit or a residual seizure disorder. Of seven children who experienced partial seizures, six had structural lesions on cranial computed tomography and residual focal neurological deficits with epilepsy. The EEGs in two patients revealed focal spikes and slowing consistent with the lateralization of the partial seizures, in four it was characterized by atypical "burst suppression," and in one showed epochs of high-amplitude delta slowing alternating with generalized suppression. Although episodic and generalized burst suppression is usually regarded as a grave prognostic indicator, all four subjects recovered.