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Classification of epilepsy syndromes and role of genetic factors
R N Choueiri1, M N Fayad, A Farah
1Department of Pediatrics, American University of Beirut, Beirut, Lebanon.
Insights
Genetic factors, including consanguinity and family history, significantly influence various childhood epilepsy syndromes. These genetic links are crucial in understanding idiopathic, cryptogenic, and symptomatic epilepsies, as well as febrile seizures.
Area of Science:
- Pediatric Neurology
- Clinical Genetics
- Epileptology
Background:
- Epilepsy syndromes in children present diverse etiological factors.
- Understanding the role of genetic predisposition, such as consanguinity and family history, is vital for accurate diagnosis and management.
- Tertiary referral centers play a key role in characterizing complex pediatric neurological conditions.
Purpose of the Study:
- To investigate the types of epilepsy syndromes in pediatric patients at a Beirut tertiary referral center.
- To determine the significance of consanguinity and family history in the occurrence of these epilepsy syndromes.
- To analyze the association between genetic factors and different epilepsy classifications.
Main Methods:
- Retrospective review of 230 pediatric patients diagnosed with seizures or epilepsy over one year.
- Classification of patients according to the International League Against Epilepsy criteria.
- Assessment of consanguinity, family history of epilepsy/febrile seizures, and other variables.
Main Results:
- Localization-related epilepsy (36%), generalized epilepsy (21.7%), and special syndromes (24.3%) were common diagnoses.
- Consanguinity was more prevalent in symptomatic and cryptogenic epilepsies (P < 0.05).
- Family history of epilepsy and febrile seizures was significantly associated with epilepsy types (P < 0.05).
Conclusions:
- Genetic factors play a significant role across various childhood epilepsy types, including idiopathic, cryptogenic, and symptomatic epilepsies.
- Family history is a critical indicator for several epilepsy syndromes.
- Consanguinity is particularly relevant in cryptogenic and symptomatic epilepsies, highlighting genetic influences.
Abstract:
In this report the types of epilepsy syndromes seen in children in a tertiary referral center in Beirut, Lebanon were studied and the importance of consanguinity and family history in the occurrence of these syndromes was investigated. Records of 230 pediatric patients evaluated during a 1-year period with the diagnosis of single seizure, febrile seizure, or epilepsy were reviewed. Each patient was classified according to the International League Against Epilepsy classification. The occurrence of consanguinity, of family history of febrile seizures or epilepsy, and of other variables was noted. Thirty-six percent of patients were diagnosed with localization-related epilepsy, 21.7% with generalized epilepsy, 11.7% with undetermined generalized or focal, and 24.3% with special syndromes. Twelve percent of patients were diagnosed with idiopathic, 15.1% with symptomatic, and 30.3% with cryptogenic epilepsies. Consanguinity was more common in patients with symptomatic and cryptogenic epilepsies than in patients with idiopathic epilepsies or with incidental seizures (P < 0.05). Family history of epilepsy was more common in patients with symptomatic, cryptogenic, and idiopathic epilepsies than in patients with incidental seizures (P < 0.05). Family history of febrile seizures but not consanguinity was more common in patients with febrile seizures (P < 0.05). We conclude that genetic factors are important not only in idiopathic epilepsies and febrile seizures but also in cryptogenic and symptomatic epilepsies.