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Benign idiopathic partial epilepsy and brain lesion
1Neuropediatric Department, University of Kiel, Germany.
Epilepsia
|March 18, 1999
Summary
A severe head injury in infancy led to epilepsy. Genetic factors for benign epilepsy traits may contribute to symptomatic epilepsy, highlighting the need for sibling EEG studies.
Area of Science:
- Neurology
- Clinical Neurophysiology
- Medical Genetics
Background:
- A 14-year-old girl presented with severe head trauma sustained at 9 days old, resulting in extensive brain damage, tetraplegia, mental retardation, and epilepsy.
- Her seizures were characterized as rolandic type, with electroencephalogram (EEG) findings of multifocal sharp waves.
Observation:
- The patient's epilepsy, initially diagnosed as purely symptomatic, was re-evaluated after her healthy sister exhibited typical benign focal sharp waves on EEG.
- This finding suggested the possibility of a phenocopy, where the brain lesion mimicked a genetic epilepsy trait.
Findings:
- The presence of similar EEG sharp-wave patterns in the sibling allowed for the exclusion of a pure phenocopy in the patient.
- This indicated that the underlying genetic predisposition for the sharp-wave trait, characteristic of benign partial epilepsies, could also play a role in the pathogenesis of seemingly symptomatic epilepsies.
Implications:
- The study suggests that genetic factors associated with benign partial epilepsy traits may contribute to the development of epilepsy even in cases with clear brain lesions.
- It underscores the importance of EEG investigations in siblings of patients with epilepsy, particularly those with apparent symptomatic causes, to rule out phenocopies and identify potential genetic contributions.