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Catastrophic epilepsy in childhood
1Division of Pediatric Neurology, Mattel Children's Hospital at UCLA, Los Angeles, California, USA. wshields@mednet.ucla.edu
Insights
Catastrophic childhood epilepsy, characterized by difficult-to-control seizures and intellectual disability, requires aggressive seizure management. Controlling seizures may improve intellectual development in some children with these severe epilepsy syndromes.
Area of Science:
- Pediatrics
- Neurology
- Developmental Neuroscience
Background:
- Epilepsy in children is often benign, but certain forms are classified as 'catastrophic' due to intractable seizures and intellectual disability.
- Catastrophic childhood epilepsies encompass rare disorders like early infantile epileptic encephalopathy with suppression burst and severe myoclonic epilepsy of infancy, alongside common syndromes such as infantile spasms and Lennox-Gastaut syndrome.
Purpose of the Study:
- To highlight the distinction between benign and catastrophic epilepsy in children.
- To explore the relationship between seizures and intellectual development in catastrophic epilepsy.
- To emphasize the importance of seizure control in mitigating cognitive deficits.
Main Methods:
- This study is a review of literature on catastrophic childhood epilepsies.
- It synthesizes information on the underlying causes, seizure characteristics, and developmental outcomes associated with these severe epilepsy syndromes.
- The review focuses on the impact of developmental plasticity on cognitive function in affected children.
Main Results:
- Many children with catastrophic epilepsy have co-occurring brain abnormalities leading to intellectual disability.
- In some cases, the seizures themselves, potentially exacerbated by developmental plasticity, appear to cause or worsen intellectual retardation.
- Effective seizure control presents an opportunity for improved intellectual development in these children.
Conclusions:
- Aggressive management and control of seizures are crucial in children diagnosed with catastrophic epilepsy.
- Intervention aimed at seizure reduction may positively influence cognitive outcomes, offering a pathway to more normal intellectual development.
- Understanding the interplay between seizures, brain plasticity, and cognitive development is key to optimizing care for these complex pediatric neurological conditions.
Abstract:
Although for most children epilepsy is a relatively benign disorder, for some, epilepsy can be designated as "catastrophic" because the seizures are so difficult to control and because they are strongly associated with mental retardation. The catastrophic childhood epilepsies include uncommon disorders such as early infantile epileptic encephalopathy with suppression burst, severe myoclonic epilepsy of infancy, and epilepsy with myoclonic-astatic seizures. There are other syndromes that are relatively common such as infantile spasms, Lennox-Gastaut syndrome, and Sturge-Weber syndrome. Many children with catastrophic epilepsy have the seizures as a result of underlying brain abnormalities that will inevitably lead to mental retardation whether or not they have seizures. In some patients, however, the mental retardation appears to be caused by the seizures. Developmental plasticity provides children with an opportunity to recover from significant brain injuries. However, the plasticity may also be the cause of the mental retardation. In such patients, control of the seizures may lead to more normal intellectual development. Thus, every effort should be made to control seizures in children with catastrophic epilepsy.