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Electroencephalographic generalized features in idiopathic childhood focal epilepsies

Mi-Sun Yum1, Tae-Sung Ko, Eun Hye Lee

  • 1Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Songpa-ku, Seoul 138-736, Republic of Korea.

Seizure
|March 23, 2010
PubMed

Insights

Generalized spike-wave discharges occur in a significant portion of children with benign childhood epilepsy with occipital paroxysms (BEOP) or centro-temporal spikes (BCECTS), suggesting a broader epilepsy syndrome. This finding indicates a potential link between focal and generalized epilepsies in children.

Area of Science:

  • Pediatric Neurology
  • Epileptology
  • Clinical Neurophysiology

Background:

  • Idiopathic focal epilepsies in childhood, such as benign childhood epilepsy with occipital paroxysms (BEOP) and benign childhood epilepsy with centro-temporal spikes (BCECTS), are defined by focal electrographic patterns.
  • Generalized epileptiform discharges in these patients may indicate a neurobiological continuum with idiopathic generalized epilepsies.

Purpose of the Study:

  • To determine the prevalence of generalized epileptiform discharges and generalized seizures in children diagnosed with BEOP or BCECTS.
  • To investigate potential links between focal and generalized epilepsy presentations in pediatric populations.

Main Methods:

  • A cohort of 220 children with idiopathic focal epilepsies (172 BCECTS, 48 BEOP) and normal neurological examinations/MRIs was analyzed.
  • Data collected included gender, age at onset, generalized seizure occurrence, and serial EEG records for generalized abnormalities.

Main Results:

  • Generalized spike-wave discharges were observed in 19.1% of patients (30/172 BCECTS, 12/48 BEOP).
  • Clinical generalized seizures occurred concurrently in 11 patients.
  • The incidence of generalized abnormalities was higher in BEOP patients compared to BCECTS patients.

Conclusions:

  • A notable proportion of BEOP/BCECTS patients exhibit generalized spike-wave discharges and, less frequently, generalized seizures.
  • These findings suggest that idiopathic focal epilepsy in children may represent a spectrum within a broader, age-related seizure susceptibility syndrome, rather than a fixed entity.
Abstract

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