Dopa-responsive dystonia in spinocerebellar ataxia 6: A case report.

Clin Neurol Neurosurg

Department of Neurology, Tokyo Metropolitan Neurological Hospital, 2-6-1 Musashidai, Fuchu-shi, Tokyo 183-0042, Japan.

Published: June 2023

Spinocerebellar ataxia 6 (SCA6) often presents with pure cerebellar ataxia. It is rarely accompanied by extrapyramidal symptoms, such as dystonia and parkinsonism. Here, we describe a case of SCA6 with dopa-responsive dystonia for the first time. A 75-year-old woman was admitted to the hospital with slowly progressive cerebellar ataxia and dystonia in the left upper limb for the past six years. Genetic testing confirmed the diagnosis of SCA6. Her dystonia improved with oral levodopa, and she was able to raise her left hand. Oral levodopa administration may provide early-phase therapeutic benefits for SCA6-associated dystonia.

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http://dx.doi.org/10.1016/j.clineuro.2023.107721DOI Listing

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  • * The identified missense variant (p.(Trp13Gly)) is associated with milder symptoms compared to severe loss-of-function variants, reinforcing the relationship between genotype and phenotype in these disorders.
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