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Hemimegalencephaly and normal intellectual development.

L Fusco1, S Ferracuti, G Fariello

  • 1Bambino Gesù Children's Hospital, National Medical Research Institute, Rome, Italy.

Journal of Neurology, Neurosurgery, and Psychiatry
|August 1, 1992
PubMed
Summary
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Hemimegalencephaly, a rare brain overgrowth condition, can present with varied symptoms. This case highlights a patient with hemimegalencephaly who was otherwise neurologically normal, demonstrating the condition's diverse clinical spectrum.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Medical Genetics

Background:

  • Hemimegalencephaly is a rare congenital brain malformation involving unilateral hemispheric overgrowth.
  • It is often associated with significant neurological impairments, developmental delays, and intractable epilepsy.
  • However, the clinical spectrum of hemimegalencephaly is known to be highly variable.

Observation:

  • This report details a case of hemimegalencephaly.
  • The patient presented with rare partial seizures as the only neurological symptom.
  • Crucially, the individual was neurologically and neuropsychologically normal otherwise.

Findings:

  • Hemimegalencephaly does not invariably lead to severe neurological deficits or developmental arrest.
  • Clinical presentation can range from severe epilepsy to mild or absent neurological impairment.

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  • This case underscores the wide variability in hemimegalencephaly's clinical expression.

    • Implications:

    • Broadens the understanding of hemimegalencephaly's clinical variability.
    • Suggests that routine neurological and developmental assessments may need careful interpretation in diagnosed cases.
    • Highlights the importance of individualized patient evaluation for hemimegalencephaly management and prognosis.