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Seizure prognosis and EEG evolution in complex partial seizures of childhood onset
I Takahashi1, K Miura, K Nomura
1Department of Pediatrics, Nagoya University, Japan.
Insights
Children with complex partial seizures have a poorer prognosis if they have mental retardation, a history of status epilepticus, or abnormal EEG basic rhythm. Anterior temporal lobe foci indicated the worst outcome.
Area of Science:
- Pediatric Neurology
- Epileptology
Background:
- Complex partial seizures (CPS) are a common epilepsy type in children.
- Understanding prognostic factors is crucial for managing pediatric epilepsy.
Purpose of the Study:
- To identify clinical and EEG predictors of seizure outcome in children with CPS.
- To compare features between seizure-free and persistently affected children.
Main Methods:
- Retrospective analysis of 126 children with CPS followed for over 4 years.
- Comparison of clinical and electroencephalogram (EEG) features between seizure-free and non-seizure-free groups.
Main Results:
- Mental retardation, history of status epilepticus, and abnormal EEG basic rhythm were associated with poor seizure prognosis.
- CT findings, history of febrile convulsions, seizure clustering, and seizure type comorbidity did not significantly impact prognosis.
- No significant difference in prognosis was observed among four EEG discharge pattern groups (fixed focus, wandering focus, multifocal spikes, no focal discharge).
- Patients with a fixed focus in the anterior temporal region showed the worst prognosis.
Conclusions:
- Specific factors like intellectual disability and status epilepticus history predict poor seizure control in pediatric CPS.
- Anterior temporal lobe epilepsy foci represent a particularly challenging subgroup requiring targeted management strategies.
Abstract:
We studied the clinical course and seizure prognosis of 126 children with complex partial seizures regularly followed up for more than 4 years in our clinic. Clinical and EEG features of 63 seizure-free patients were compared with those of 63 patients with persistent seizures. The features contributing to poor prognosis were 1) mental retardation, 2) a history of status epilepticus and 3) abnormal basic rhythm in EEG. CT abnormality, a history of febrile convulsions (FC), the clustering of seizures and association with other types of seizures did not influence prognosis. We divided the patients into four groups according to the evolutionary pattern of seizure discharges: Group A, 55 (43.7%) patients with spike focus always fixed in the same region; Group B, 20 (15.9%) patients with wandering foci; Group C, 10 (7.4%) patients with multifocal spikes; and group D, 41 (32.5%) patients with no focal discharges. There was no difference in seizure prognosis among these four groups, but the patients with a focus in the anterior temporal region in Group A evidenced the worst prognosis.