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Secondary (symptomatic) dystonic syndromes 

Secondary (symptomatic) dystonic syndromes
Author(s):

Ivan Donaldson

, C. David Marsden

, Susanne A. Schneider

, and Kailash P. Bhatia

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date: 22 October 2020

Secondary or symptomatic dystonic disorders are those in which dystonia is not the major neurological feature, or if it is the main clinical picture it is due to a recognized cause or is a feature of a system degeneration. Such disorders include neurological disorders, such as Huntington’s disease, in which dystonia occurs only infrequently, and conditions such as Lesch-Nyhan syndrome, in which dystonia is a regular feature but is secondary to a known metabolic disturbance. Symptomatic dystonias can be subdivided into inherited and acquired diseases. Lesch-Nyhan syndrome and cerebral palsy each have their own chapters in the inherited and acquired sections: Chapters 40 and 41 respectively, while the remaining disorders have been grouped together.

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