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Related Experiment Videos

Epilepsy and ring chromosome 20: case report.

Marleide da Mota Gomes1, Irene Lucca, Sonia Alonso Monteiro Bezerra

  • 1Programa de Epilepsia, Instituto de Neurologia Deolindo Couto, Brasil.

Arquivos De Neuro-Psiquiatria
|September 24, 2002
PubMed
Summary

This study details a rare ring chromosome 20 [r(20)] anomaly in a young male, revealing unique brain abnormalities and drug-resistant epilepsy. Findings suggest new chromosomal links for complex neurological conditions.

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Area of Science:

  • Genetics
  • Neurology
  • Neuroscience

Background:

  • Ring chromosome 20 [r(20)] is a rare cytogenetic anomaly.
  • Epilepsy has been previously associated with the 20q13 region.

Observation:

  • A young male patient presented with a de novo 46,XY,r(20)(p13q13.3) karyotype.
  • Clinical features included mental retardation, emotional liability, strabismus, and refractory seizures.
  • Neuroimaging revealed corpus callosum, uvula, nodule, and cerebellum pyramid hypoplasias, along with occipital arachnoid cysts.

Findings:

  • Electroencephalography (EEG) showed dynamic changes, including high-amplitude slow waves and sharp components, and theta wave bursts.
  • Structural brain anomalies were observed, which have not been previously reported with this specific chromosomal abnormality.

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  • The patient experienced prolonged confusional states with or without motor symptoms.

    • Implications:

    • This case expands the understanding of neurological manifestations associated with r(20) syndrome.
    • It suggests potential novel chromosomal loci for atypical neurological characteristics and epilepsy.
    • Highlights the importance of detailed neuroimaging and EEG in characterizing rare chromosomal disorders.