Age of onset
The age at which symptoms begin is referred to as age of onset. If an individual develops symptoms prior to approximately age 30, it may be referred to as early-onset or childhood-onset. (If the dystonia occurs during the teen years, the term adolescent-onset may be used.)
If symptoms develop after the age of 30, it is called late-onset or adult-onset.
These forms of dystonia are typically early-onset:
DYT1 generalized dystonia
Non-DYT1 generalized dystonia
Paroxysmal dystonia & dyskinesias
Rapid-onset dystonia-parkinsonism
X-linked dystonia-parkinsonism
These forms of dystonia are typically adult-onset:
Laryngeal dystonia (spasmodic dysphonia)
Hand dystonia (writer’s cramp)
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