Related Experiment Videos
Clinical study of catastrophic infantile epilepsy with focal seizures
Kayano Ishii1, Hirokazu Oguni, Kitami Hayashi
1Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan.
Insights
This study examined catastrophic infantile epilepsy in 15 infants, finding it often presents with multifocal seizures and a severe course, regardless of cause. Early diagnosis and understanding the underlying cause are crucial for managing this challenging epilepsy. Keywords: infantile epilepsy, focal seizures, psychomotor retardation.
Area of Science:
- Pediatric Neurology
- Epileptology
- Clinical Neuroscience
Background:
- Catastrophic infantile epilepsy with focal seizures is a severe condition presenting before 12 months.
- Distinguishing it from Ohtahara and West syndromes is crucial for accurate diagnosis and management.
- Understanding its clinico-electrical and etiologic features is vital for improving patient outcomes.
Purpose of the Study:
- To investigate the clinico-electrical and etiologic characteristics of catastrophic infantile epilepsy with focal seizures.
- To classify patients into subgroups based on clinical presentation and neurological progression.
- To identify potential underlying causes and guide further research into etiopathogenesis.
Main Methods:
- Retrospective analysis of 15 infants with early-onset focal seizures resistant to antiepileptic drugs.
- Exclusion of Ohtahara syndrome and West syndrome.
- Classification into subgroups based on neurological symptoms, cerebral atrophy, and seizure onset patterns.
Main Results:
- Three subgroups were identified: progressive neurological deterioration with cerebral atrophy, hemiparesis with lateralized onset due to focal cortical dysplasia, and multifocal onset without rapid deterioration.
- All patients except one exhibited moderate to severe psychomotor retardation.
- Catastrophic infantile epilepsy with focal seizures frequently showed multifocal onset and a detrimental clinical course.
Conclusions:
- Catastrophic infantile epilepsy with focal seizures is characterized by multifocal onset and a severe clinical course, irrespective of the etiology.
- Migratory focal seizures are common, necessitating a thorough search for underlying etiopathogenesis.
- Investigations should include metabolic errors and localized or lateralized structural abnormalities.
Abstract:
This study investigated clinico-electrical and etiologic characteristics of catastrophic infantile epilepsy with focal seizures developed in early infancy. The patients included 15 children who fulfilled the following criteria: seizure onset before 12 months of age, presence of daily focal or secondarily generalized seizures resistant to antiepileptic drugs for at least 3 months, and exclusion of Ohtahara and West syndromes. Patients were classified into three subgroups. Three patients demonstrated progressively deteriorating neurologic symptoms associated with progressive cerebral atrophy and multifocal seizure onset. Three other children were characterized by hemiparesis and exclusively lateralized seizure onset because of focal cortical dysplasia in the contralateral hemisphere. The remaining nine children did not demonstrate any rapidly progressive neurologic deterioration or increasing cerebral atrophy and exhibited multifocal seizure onset. At the last examinations, all except one patient demonstrated moderate to severe psychomotor retardation. Catastrophic infantile epilepsy with focal seizures tended to demonstrate multifocal seizure onset and a deleterious clinical course with numerous focal seizures regardless of etiology. Because migratory focal seizures appear to be common in these infants, we have to search for the underlying etiopathogenesis of these patients, including not only metabolic errors but also localized or lateralized structural abnormality.