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Epilepsy in chromosomal abnormalities: an Italian sample.

Antonia Parmeggiani1, Annio Posar, Simona Giovannini

  • 1Child Neurology and Psychiatry Unit, University of Bologna, Italy. antonia.parmeggiani@unibo.it

Journal of Child Neurology
|June 23, 2005
PubMed
Summary

Epilepsy affects over half of patients with chromosomal abnormalities, often presenting with generalized seizures and profound intellectual disability. Early genetic testing is recommended for epilepsy cases with unexplained mental retardation.

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Area of Science:

  • Genetics
  • Neurology
  • Clinical Medicine

Background:

  • Epilepsy is frequently observed in individuals with chromosomal abnormalities, yet comprehensive research remains limited.
  • Chromosomal abnormalities represent a significant genetic factor contributing to neurological disorders, including epilepsy.

Purpose of the Study:

  • To investigate the prevalence and clinical-electroencephalographic (EEG) characteristics of epilepsy in an Italian cohort with chromosomopathies.
  • To compare epilepsy occurrence and features between patients with and without chromosomal abnormalities.

Main Methods:

  • Analysis of 45 patients with various chromosomal abnormalities, divided into epilepsy (group 1) and non-epilepsy (group 2) cohorts.
  • Comparison of epilepsy types with a general Italian epilepsy population.

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  • Assessment of clinical and EEG variables, including mental retardation and seizure types.

    • Main Results:

    • Epilepsy was present in 51.1% of patients, predominantly in those with autosomal abnormalities, though not statistically significant.
    • EEG abnormalities were significantly more prevalent in the epilepsy group (P < .0001), with continuous spike-waves during sleep noted in three cases.
    • Profound mental retardation was more common in the epilepsy group (P < .001), while mild mental retardation was more frequent in the non-epilepsy group (P < .05).
    • Generalized epilepsies were significantly predominant (P < .00001).

    Conclusions:

    • Epilepsy is a common comorbidity in chromosomal abnormalities, characterized by a high incidence of generalized seizures and profound intellectual disability.
    • High-resolution karyotyping is advised for epilepsy patients with unexplained mental retardation to identify potential underlying chromosomal abnormalities.