Spinocerebellar Ataxia Type 19/22

**Semantic type:** Disease or Syndrome

**Definition:** An autosomal dominant form of spinocerebellar ataxia (SCA), caused by mutation(s) in the KCND3 gene, encoding potassium voltage-gated channel subfamily D member 3. SCA19 and SCA22 were initially described independently, but the molecular basis for both conditions is mutation(s) in the KCND3 gene.

**Synonyms:** - SCA 19/22