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Dystonia
Inheritance patterns and prenatal diagnosis
Inheritance patterns
It is mainly the more severe childhood onset forms that are genetic in origin. Both DYT1 dystonia and dopa-responsive dystonia are inherited in an autosomal dominant pattern. This means that any child of an affected parent has a 50/50 chance of inheriting the abnormal gene. However, it is clear that even if an individual inherits the abnormal gene, this does not always mean that they develop dystonia. Thus for DYT1 dystonia the risk to a child of an affected parent of developing dystonia is around twenty per cent.
Prenatal diagnosis
None.
What are the causes?
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