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[Electroencephalographic changes in sisters with infantile-onset dentatorubral-pallidoluysian atrophy (DRPLA)]

Rika Hashi1, Akihiro Nakamura, Tateo Sugimoto

  • 1Department of Pediatrics, Otokoyama Hospital, Kansai Medical University, Yawata, Kyoto. miyazakr@otokoyam.kmu.ac.jp

No to Hattatsu = Brain and Development
|November 22, 2007
PubMed

Insights

This study details two sisters with infantile dentatorubral pallidoluysian atrophy (DRPLA), highlighting varied clinical courses and distinct electroencephalographic (EEG) findings. Genetic analysis confirmed DRPLA, with repeat sizes correlating to disease severity and progression.

Area of Science:

  • Neuroscience
  • Genetics
  • Clinical Neurology

Background:

  • Infantile dentatorubral pallidoluysian atrophy (DRPLA) is a rare neurodegenerative disorder.
  • Understanding its clinical spectrum and electrophysiological characteristics is crucial for diagnosis and management.

Observation:

  • Two sisters presented with infantile DRPLA, exhibiting distinct developmental trajectories and seizure patterns.
  • The elder sister showed rapid neurological deterioration, cerebellar atrophy, and difficult-to-control seizures, with specific EEG findings.
  • The younger sister experienced milder developmental delay and seizures, with different EEG characteristics.

Findings:

  • Genetic analysis confirmed DRPLA in both sisters, with CAG repeat sizes of 86/19 in the elder and 79/11 in the younger.
  • EEG in the elder sister showed high-voltage slow waves, while the younger sister exhibited diffuse 3-4 Hz spike-and-wave complexes.
  • Clinical severity correlated with CAG repeat length, influencing disease progression and EEG patterns.

Implications:

  • This case series emphasizes the variable clinical presentation of infantile DRPLA.
  • Distinct EEG patterns may aid in differentiating disease severity and progression.
  • Further research into genotype-phenotype correlations in DRPLA is warranted.

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