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Delayed cyanide induced dystonia.
  1. R Valenzuela,
  2. J Court,
  3. J Godoy
  1. Department of Neurology and Neurosurgery, Universidad Católica de Chile, Santiago.


    A 16 year old man ingested 1 g potassium cyanide in 1969. A few days after an apparently full recovery he developed a severe dystonia syndrome. He had a positive response to an apomorphine test and showed improvement with levodopa treatment. A 21 year follow up showed minimal neurological sequelae; CT showed bilateral putaminal lucencies. Visual and brain stem auditory evoked potentials were normal.

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