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Low-grade focal cortical dysplasia is associated with prenatal and perinatal brain injury

Pavel Krsek1, Alena Jahodova, Bruno Maton

  • 1Department of Pediatric Neurology, Charles University, Second Medical School, Motol University Hospital, Prague, Czech Republic.

Epilepsia
|October 5, 2010
PubMed

Insights

Prenatal and perinatal brain injuries are linked to focal cortical dysplasia (FCD) and epilepsy in children. Early detection of these cortical malformations is crucial for effective surgical planning and improved seizure control.

Area of Science:

  • Pediatric Neurology
  • Developmental Neuroscience
  • Epileptology

Background:

  • Prenatal and perinatal adverse events are suspected contributors to focal cortical dysplasia (FCD).
  • Limited data exist on the prevalence and impact of this association in pediatric epilepsy.
  • Mild malformations of cortical development (mMCD) and FCD are significant causes of intractable epilepsy.

Purpose of the Study:

  • To investigate the prevalence and significance of prenatal and perinatal adverse events in children with histologically confirmed mMCD/FCD.
  • To analyze the clinical, imaging, and histopathological characteristics of mMCD/FCD in relation to prenatal/perinatal insults.
  • To determine the impact of prenatal/perinatal factors on epilepsy severity and surgical outcomes.

Main Methods:

  • Retrospective analysis of a surgical cohort of 200 patients with confirmed mMCD/FCD.
  • Inclusion criteria combined historical and radiological evidence of prenatal/perinatal risk factors.
  • Review of electroclinical, imaging, neuropsychological, surgical, histopathological, and seizure outcome data.

Main Results:

  • Prenatal/perinatal insults occurred in 12.5% of mMCD/FCD patients, associated with early-onset, frequent, and intractable epilepsy.
  • These patients exhibited more neurological deficits, lower IQ scores, and slower EEG background activity.
  • Cortical malformations were detected by MRI in 74%; 54% achieved seizure freedom after surgery, with milder forms (mMCD, FCD type I) being most common.

Conclusions:

  • Surgically treatable cortical malformations can arise from significant prenatal/perinatal encephalopathies, playing a key role in epilepsy pathogenesis.
  • Presurgical identification of dysplastic cortex is vital for optimizing surgical strategies in these complex cases.
  • Understanding the link between early brain injury and cortical development is critical for pediatric epilepsy management.
Abstract

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