Function and organization in dysgenic cortex: Case report

Mark C. Preul, Richard Leblanc, Fernando Cendes, Francois Dubeau, David Reutens, Roberto Spreafico, Giorgio Battaglia, Massimo Avoli, Pierre Langevin, Douglas L. Arnold, Jean Guy Villemure

Research output: Contribution to journalArticlepeer-review


Cerebral dysgenesis is a subject of interest because of its relationship to cerebral development and dysfunction and to epilepsy. The authors present a detailed study of a 16-year-old boy who underwent surgery for a severe seizure disorder. This patient had dysgenesis of the right hemisphere, which was composed of a giant central frontoparietal nodular gray matter heterotopia with overlying large islands of cortical dysplasia around a displaced central fissure. Exceptional insight into the function, biochemistry, electrophysiology, and histological structure of this lesion was obtained from neurological studies that revealed complementary information: magnetic resonance (MR) imaging, [18]fluoro-2-deoxy-D-glucose positron emission tomography (PET), functional PET scanning, proton MR spectroscopic (1H-MRS) imaging, intraoperative cortical mapping and electrocorticography, in vitro electrophysiology, and immunocytochemistry. These studies demonstrated compensatory cortical reorganization and showed that large areas of heterotopia and cortical dysplasia in the central area may retain normal motor and sensory function despite strikingly altered cytoarchitectonic organization and neuronal metabolism. Such lesions necessitate appropriate functional imaging studies prior to surgery and cortical mapping to avoid creating neurological deficits. Integrated studies, such as PET, 1H-MRS imaging, cortical mapping, immunocytochemistry, and electrophysiology may provide information on the function of developmental disorders of cerebral organization.

Original languageEnglish
Pages (from-to)113-121
Number of pages9
JournalJournal of Neurosurgery
Issue number1
Publication statusPublished - Jul 1997


  • Cerebral dysgenesis
  • Cortical dysplasia
  • Cortical mapping
  • Cortical organization
  • Epilepsy
  • Heterotopia

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)


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