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Up to: Autosomal dominant cerebellar ataxia type I
Spinocerebellar ataxia type 20
Spinocerebellar ataxia type 20 (SCA20) is a very rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by cerebellar dysarthria as the initial typical manifestation.
This condition has no sub-types.