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Partial seizures in West syndrome

Y Ohtsuka1, I Murashima, T Asano

  • 1Department of Child Neurology, Okayama University Medical School, Japan.

Epilepsia
|November 1, 1996
PubMed
Summary
This summary is machine-generated.

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Partial seizures (PS) occur in over a third of children with West syndrome (WS), often associated with less favorable seizure prognosis and specific clinical features. Understanding PS patterns is crucial for assessing underlying cortical lesions in WS.

Area of Science:

  • Pediatric Neurology
  • Epileptology

Background:

  • West syndrome (WS) is a severe infant epilepsy characterized by infantile spasms, hypsarrhythmia, and developmental delay.
  • Partial seizures (PS) are less commonly studied in the context of WS, particularly in older children.

Purpose of the Study:

  • To investigate the occurrence and characteristics of partial seizures (PS) in children diagnosed with West syndrome (WS).
  • To elucidate the electroclinical and radiologic features associated with PS in WS patients.

Main Methods:

  • A cohort of 92 children with WS, older than 3 years at follow-up, were analyzed.
  • Electroclinical and radiologic data were collected and assessed.

Main Results:

  • Partial seizures (PS) were observed in 39.1% of children with WS.

Related Experiment Videos

  • Children with PS showed a higher incidence of asymmetric spasms, hemiparesis, and asymmetric hypsarrhythmia, with a less favorable seizure prognosis.
  • The timing and characteristics of PS varied, with early-onset PS often showing high frequency and variability, while later-onset PS were more stereotyped and originated from frontal regions.

    • Conclusions:

    • Cortical lesions may contribute to both spasms and PS in some WS patients, while others exhibit more diffuse cortical hyperexcitability.
    • Focal discharges in WS require cautious interpretation as they can fluctuate and may not always indicate a surgically accessible lesion.
    • Stable focal discharges correlating with consistent clinical patterns suggest a greater likelihood of an underlying cortical lesion.