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Related Experiment Video

Updated: Feb 5, 2026

A Versatile Murine Model of Subcortical White Matter Stroke for the Study of Axonal Degeneration and White Matter Neurobiology
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[Neuropathologic study of massive subcortical heterotopia].

W Wang1, F Lian, Y J Fu

  • 1Department of Pathology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China.

Zhonghua Bing Li Xue Za Zhi = Chinese Journal of Pathology
|September 18, 2018
PubMed
Summary

Massive subcortical heterotopia, a rare neuronal migration disorder, is linked to refractory epilepsy. Surgical intervention in five patients resulted in seizure freedom, suggesting potential therapeutic benefits.

Keywords:
Cerebral cortexEpilepsies, partialMalformations of cortical development

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Area of Science:

  • Neurology
  • Neuroscience
  • Pathology

Background:

  • Heterotopia represents a class of malformations arising from aberrant neuronal migration during embryonic development.
  • Massive subcortical heterotopia is a rare subtype characterized by extensive gray matter displacement within the white matter.
  • These malformations are often associated with neurological deficits, particularly refractory epilepsy.

Purpose of the Study:

  • To elucidate the clinicopathologic characteristics of massive subcortical heterotopia.
  • To explore the potential underlying mechanisms contributing to this rare condition.
  • To evaluate the clinical outcomes following surgical intervention for refractory epilepsy associated with massive subcortical heterotopia.

Main Methods:

  • A retrospective analysis of clinical, histological, and neuropathological data from five patients diagnosed with massive subcortical heterotopia.
  • Review of magnetic resonance imaging (MRI) findings to determine lesion location and extent.
  • Assessment of patient outcomes, including seizure control, following surgical treatment.

Main Results:

  • Five patients (3 males, 2 females) with a history of refractory epilepsy (mean duration 15.4 years) were studied.
  • MRI revealed heterotopic lesions predominantly in the temporal and parietal lobes.
  • Pathological examination confirmed extensive subcortical and deep white matter gray matter heterotopias; one case also exhibited polymicrogyria and other heterotopia types.

Conclusions:

  • Massive subcortical heterotopia is a rare condition resulting from widespread neuronal migration abnormalities.
  • The co-occurrence of heterotopia with polymicrogyria suggests complex pathogenetic mechanisms requiring further investigation.
  • Surgical treatment led to seizure cessation in all five patients, highlighting its efficacy for associated refractory epilepsy.