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Epileptic syndromes in childhood: clinical features, outcomes, and treatment
Peter Camfield1, Carol Camfield
1Department of Pediatrics, Dalhousie University and the IWK Health Centre, Halifax, Nova Scotia, Canada.
Insights
Childhood onset epilepsies range from benign to catastrophic, impacting development differently. Understanding these categories is crucial for effective management and improved outcomes in pediatric epilepsy.
Area of Science:
- Pediatric Neurology
- Developmental Neuroscience
Background:
- Childhood epilepsies present diverse clinical features, developmental impacts, and treatment responses.
- Developmental tasks in childhood involve motor, intellectual, and social skill refinement.
Observation:
- Epilepsies are categorized as benign, intermediate, or catastrophic based on developmental impact.
- Benign rolandic epilepsy often requires no medication; benign occipital epilepsy definitions vary.
- Intermediate epilepsies like childhood absence epilepsy can cause learning disorders and poor social outcomes.
- Generalized epilepsy with febrile seizures plus (GEFS+) shows variable severity and genetic links to sodium channels.
Findings:
- Catastrophic childhood epilepsies, including Lennox-Gastaut syndrome, respond inconsistently to anti-epileptic drugs (AEDs).
- Continuous spike-wave in slow sleep and Landau-Kleffner syndrome are severe forms with developmental regression.
- Many childhood epilepsies are benign, but some significantly impair cognitive and social development.
Implications:
- Classification of childhood epilepsies aids in predicting developmental trajectories and guiding treatment strategies.
- Further research into specific syndromes like GEFS+ can clarify genetic underpinnings and therapeutic targets.
- Distinguishing between benign and severe epilepsy forms is vital for optimizing interventions and supporting affected children.
Abstract:
We reviewed the clinical features, outcome, and treatment of many of the epileptic syndromes that begin in the childhood from 2 to 12 years of age, using a review of the literature and personal experience, with most references to authoritative texts. The developmental tasks of childhood are centered on refinement of motor skills and development of complex intellectual and social skills. The childhood onset epilepsies can be divided into benign, intermediate, and catastrophic based on their impact on childhood development. The clearest benign epilepsy is benign rolandic epilepsy, which often does not require medication treatment. The definition of benign occipital epilepsy is still often vague. In the intermediate category, childhood absence epilepsy often has associated learning disorders and a poor social outcome. About 50% of children with cryptogenic partial seizures have a very benign course, even though their epilepsy syndrome is not well defined. Generalized epilepsy with febrile seizures plus (GEFS+) has a dominant inheritance with a defined defect in cerebral sodium channels, but varies considerably in severity within affected members of the same kindred. The catastrophic epilepsies in childhood all have an inconsistent response to AED treatment and include continuous spike-wave in slow sleep (with variable severity), Landau-Kleffner syndrome (with a confusing overlap with autistic regression), the Lennox Gastaut syndrome (with broad defining features), and myoclonic-astatic epilepsy (with important overlaps with Lennox-Gastaut). Many of the epilepsies that begin in childhood are benign. Others interfere seriously with cognitive and social development.