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Epilepsy with occipital features in children: factors predicting seizure outcome and neuroimaging abnormalities
Dewi Schrader1, Ruchika Shukla, Renee Gatrill
1Division of Pediatric Neurology, Department of Pediatrics, University of British Columbia and British Columbia's Children's Hospital, 4480 Oak Street, Vancouver, BC, V6H 3V4, Canada.
Insights
In children with occipital epilepsy, an early age of seizure onset and abnormal neurological exams strongly predict abnormal MR imaging findings. Seizure outcomes were not reliably predicted by these factors.
Area of Science:
- Pediatric Neurology
- Epileptology
- Neuroimaging
Background:
- Occipital epilepsy is a significant neurological condition in children.
- Identifying predictors of neuroimaging abnormalities and seizure outcomes is crucial for management.
Purpose of the Study:
- To identify clinical and electroencephalogram (EEG) features predicting Magnetic Resonance (MR) imaging abnormalities in pediatric occipital epilepsy.
- To determine predictors of seizure outcome in this population.
Main Methods:
- Retrospective analysis of a pediatric epilepsy database.
- Evaluation of clinical and EEG data from patients with occipital lobe involvement.
- Correlation of features with MR imaging results and seizure outcomes.
Main Results:
- Early age of seizure onset and abnormal neurological examinations were significant predictors of abnormal MR imaging.
- Thirty-three patients had normal neurological development and neuroimaging; 22 met criteria for idiopathic occipital syndromes.
- No variables strongly predicted seizure outcome.
Conclusions:
- Early seizure onset and abnormal neurological exams are key indicators of MR imaging abnormalities in pediatric occipital epilepsy.
- Further research may be needed to identify predictors of seizure outcome.
Purpose:
The objective of this retrospective study was to identify clinical and EEG features in children with occipital epilepsy that predict MR imaging abnormalities and seizure outcome.
Methods:
Patients with clinical and/or EEG features indicating occipital lobe involvement were identified from the epilepsy database at a tertiary children's hospital. The clinical and EEG features were analyzed to identify the most important predictors of abnormal MR imaging and seizure outcome.
Results:
Sixty-six patients were identified: 21 had symptomatic epilepsy with abnormal MR imaging; 12 patients had probable symptomatic epilepsy based on an abnormal neurological exam; 33 patients had normal neurological development, normal neurological examination and normal neuroimaging. Twenty-two of these 33 patients satisfied criteria for idiopathic occipital syndromes: Panayiotopoulos syndrome (9 patients), Gastaut type idiopathic childhood occipital epilepsy (12 patients) and idiopathic photosensitive occipital epilepsy (1 patient). Eleven patients could not be classified. Early age of seizure onset and an abnormal neurological examination were significant predictors of abnormal MR imaging. None of the variables examined were strong predictors of seizure outcome.
Conclusion:
Early age of seizure onset and an abnormal neurological examination are the best predictors of abnormal MR imaging in children with epilepsy with occipital features.
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