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Febrile seizures and mesial temporal sclerosis
1Department of Neurology, FCM, UNICAMP, Campinas, Sao Paulo, Brazil. fcendes@unicamp.br
Current Opinion in Neurology
|March 17, 2004
Summary
Febrile seizures can lead to temporal lobe epilepsy and mesial temporal sclerosis, but the exact cause is complex. Genetic factors play a significant role in this relationship, interacting with environmental influences.
Area of Science:
- Neurology
- Epileptology
- Genetics
Background:
- The link between febrile seizures and subsequent epilepsy, particularly temporal lobe epilepsy with mesial temporal sclerosis, is debated.
- While some studies suggest febrile seizures cause mesial temporal sclerosis, others propose pre-existing hippocampal damage or genetic predisposition.
Purpose of the Study:
- To review the current understanding of the relationship between febrile seizures and mesial temporal sclerosis.
- To explore the potential causal mechanisms, including direct injury and genetic factors.
Main Methods:
- Review of existing imaging, clinical, and molecular genetic studies.
- Analysis of evidence supporting different etiological hypotheses.
Main Results:
- Prolonged febrile seizures can cause acute hippocampal injury, potentially leading to atrophy.
- Genetic predisposition is increasingly recognized as a key factor in both febrile seizures and mesial temporal sclerosis.
- Specific genes associated with febrile seizure syndromes have been identified.
Conclusions:
- Mesial temporal sclerosis likely arises from multiple causes.
- Complex febrile seizures may contribute to mesial temporal sclerosis and temporal lobe epilepsy, though findings are inconsistent.
- The association between febrile seizures and temporal lobe epilepsy is probably due to intricate genetic and environmental interactions.