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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

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Migration of epileptic spike foci in encephalograms may correlate with a better outcome in pediatric epilepsy

Inn-Chi Lee1, Yung-Jung Chen, Hong-Shen Lee

  • 1Department of Pediatrics, Chung Shan Medical University Hospital and Institute of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan. i0000528@ms12.hinet.net

Brain & Development
|January 12, 2010
PubMed

Insights

Epileptic spike foci that remain fixed in children correlate with worse outcomes, including more medications and abnormal findings, compared to migrating foci. Further research into idiopathic epilepsy is needed.

Area of Science:

  • Pediatric Neurology
  • Epileptology
  • Neurophysiology

Background:

  • Epileptic spike foci in children can be static (fixed foci, FF) or dynamic (migrated foci, MF).
  • Understanding the prognostic implications of focus location and stability is crucial for pediatric epilepsy management.

Purpose of the Study:

  • To compare clinical outcomes between children with fixed epileptic spike foci and those with migrated foci.
  • To investigate the relationship between focus migration patterns and epilepsy severity.

Main Methods:

  • Analysis of 969 electroencephalograms (EEGs) from 463 children with epilepsy over 3 years.
  • Classification of epileptic spike foci into frontal, temporal, central, parietal, or occipital regions.
  • Categorization of focus migration into anterior, posterior, lateral, and unclassified directions.

Main Results:

  • Of 79 eligible cases, 24 (30%) had FF and 55 (70%) had MF.
  • Patients with FF showed significantly higher rates of multiple antiepileptic drug use (P=0.004), abnormal imaging (P=0.014), mental retardation (P=0.035), and poorer seizure control (P=0.047).
  • Seizure frequency (P=0.007) and number of prescribed drugs (P=0.047) were significantly higher in the FF group.

Conclusions:

  • Fixed epileptic spike foci in children are associated with poorer clinical outcomes compared to migrated foci.
  • While trends persisted in symptomatic and cryptogenic epilepsies, outcomes in idiopathic epilepsy with FF did not significantly differ from MF.
  • Benign childhood epilepsy with centrotemporal spikes (BECTs) showed a higher prevalence of FF compared to Panayiotopoulos syndrome (PS).
  • Further investigation into idiopathic epilepsy is warranted to clarify outcome correlations.

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