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Dystrophic neuritic processes in epileptic cortex.

A R Judkins1, B E Porter, N Cook

  • 1Division of Pathology at the Children's Hospital of Philadelphia, Department of Pathology at the University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.

Epilepsy Research
|April 25, 2006
PubMed
Summary

A common feature in pediatric cortical dysplasia, a dystrophic neuritic background, is identified. This neuropathologic finding is strongly associated with refractory epilepsy in children.

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Area of Science:

  • Neuropathology
  • Pediatric Neurology
  • Epilepsy Research

Background:

  • Cortical dysplasia is frequently observed in pediatric epilepsy surgery.
  • The link between specific cortical dysplasia features and epilepsy causation remains unclear.
  • Existing classification schemes lack detailed neuropathologic correlates.

Purpose of the Study:

  • To identify and characterize common neuropathologic features of cortical dysplasia in pediatric epilepsy.
  • To assess the association of identified features with refractory epilepsy.
  • To determine the specificity of these features for cortical dysplasia.

Main Methods:

  • Retrospective review of 28 pediatric surgical resections.
  • Histopathological analysis focusing on neurofilament staining.

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  • Correlation of neuropathologic findings with clinical diagnoses and epilepsy status.

    • Main Results:

    • A dystrophic neuritic background, characterized by maloriented and misshapen neurofilament processes, was identified in all cases of cortical dysplasia.
    • This feature was present in 26 of 28 patients with refractory epilepsy.
    • The dystrophic neuritic background was largely absent in epilepsy cases with other primary pathologies, except for one ganglioglioma.

    Conclusions:

    • A dystrophic neuritic background is a common and specific neuropathologic finding in cortical dysplasia.
    • This feature is strongly associated with refractory epilepsy in children.
    • It may serve as a valuable diagnostic marker in pediatric epilepsy surgery specimens.