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Early detection of abnormalities in partial epilepsy using magnetic resonance
J H Cross1, G D Jackson, B G Neville
1Institute of Child Health, London.
Insights
Optimized magnetic resonance imaging (MRI) detected brain abnormalities in children with intractable complex partial seizures. Temporal lobe abnormalities were common in temporal lobe epilepsy, aiding early assessment and treatment decisions.
Area of Science:
- Neurology
- Pediatric Neurology
- Neuroradiology
Background:
- Intractable complex partial seizures in children pose diagnostic challenges.
- Accurate localization of seizure onset is crucial for effective management.
- Magnetic resonance imaging (MRI) is a key tool in evaluating brain structure.
Purpose of the Study:
- To report the incidence of brain abnormalities in children with intractable complex partial seizures using optimized MRI.
- To correlate MRI findings with clinical epilepsy classifications.
- To assess the utility of MRI in identifying candidates for epilepsy surgery.
Main Methods:
- Retrospective review of 30 children with intractable complex partial seizures.
- Optimized MRI protocols focusing on hippocampus and cortical grey matter.
- Correlation of imaging findings with clinical diagnosis (temporal lobe epilepsy, unlocalized, extratemporal epilepsy).
Main Results:
- Hippocampal or temporal lobe abnormalities were present in all 19 children with temporal lobe epilepsy.
- Six of seven children with clinically unlocalized epilepsy showed temporal/hippocampal abnormalities.
- No temporal or hippocampal abnormalities were found in children with extratemporal epilepsy.
- Generalized cortical abnormalities were noted in 14 children across all groups.
Conclusions:
- Optimized MRI effectively identifies focal brain abnormalities in pediatric intractable epilepsy.
- MRI facilitates early, non-invasive assessment and patient selection for epilepsy surgery.
- Findings contribute to understanding the structural basis of epilepsy and inform treatment decisions.
Abstract:
The incidence of brain abnormalities determined by magnetic resonance in 30 consecutive children presenting with intractable complex partial seizures is reported. Images were optimised to visualise the hippocampus and cortical grey matter. Abnormalities of the hippocampus or temporal lobe were seen in all 19 children with clinical features of temporal lobe epilepsy and in six of the seven children with clinically unlocalised epilepsy. By contrast, in the four children with a clinical diagnosis of extratemporal epilepsy, no temporal or hippocampal abnormalities were seen. Generalised cortical abnormalities of uncertain significance were found in a total of 14 children from all groups. The identification of focal brain abnormalities using optimised magnetic resonance imaging enables early non-invasive assessment of children with intractable seizure disorders and the identification of patients for whom epilepsy surgery may be appropriate. It may also lead to a better understanding of the structural basis of intractable epilepsy, and thereby contribute to early treatment decisions.