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Aetiology

Authoring team

Possible causes of tics include:

  • idiopathic, occurring typically in up to 20% of boys between ages 8 and 15
  • secondary to drugs
  • post encephalitis lethargica
  • post-traumatic
  • part of Gilles de la Tourette's syndrome
  • association with anxiety
  • abetalipoproteinaemia

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