Abstract
Dopa-responsive dystonia (DRD) related to GCH1 mutation is a movement disorder. An autosomal dominant mutation in the GCH1 gene is the most common cause of DRD. DRD is majorly characterized by dystonia and also, it may have different clinical presentation. Dystonia in DRD commonly has a typical phenotype that presents with lower limb onset and subsequently generalizes. Patients with DRD have a dramatic positive response to levodopa.
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