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Related Experiment Videos

Familial dopa-responsive cervical dystonia.

S A Schneider1, M D Mohire, I Trender-Gerhard

  • 1Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, UCL, London, UK.

Neurology
|March 1, 2006
PubMed
Summary

Young-onset cervical dystonia responded dramatically to levodopa in four patients from two families. Genetic testing was negative, suggesting potential new forms of dopa-responsive dystonia. Levodopa is recommended for early-onset cervical dystonia.

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Area of Science:

  • Neurology
  • Genetics
  • Movement Disorders

Background:

  • Dopa-responsive dystonia (DRD) is a rare genetic disorder typically presenting in childhood.
  • Cervical dystonia is a common form of focal dystonia, characterized by involuntary contractions of neck muscles.

Observation:

  • Four pediatric patients from two unrelated families presented with young-onset cervical dystonia.
  • Symptoms included predominant cervical dystonia, postural hand tremor, and laryngeal dystonia.
  • Onset age ranged from 9 to 15 years, with a mean of 12 years.

Findings:

  • All patients exhibited a dramatic and sustained response to levodopa treatment.
  • Genetic testing for known DRD-associated genes (GTP cyclohydrolase I, tyrosine hydroxylase, sepiapterin reductase) was negative.

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  • These findings suggest the possibility of novel genetic forms of dopa-responsive dystonia.

    • Implications:

    • Levodopa should be considered in the management of all patients diagnosed with young-onset cervical dystonia.
    • Further research is warranted to identify the genetic basis of these newly observed DRD cases.
    • Early diagnosis and treatment with levodopa can significantly improve outcomes for patients with this condition.