Spinocerebellar ataxia type 21
ORPHA:98773· ICD-10 G11.1
Definition
Spinocerebellar ataxia type 21 (SCA21) is a very rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by slowly progressive cerebellar ataxia, mild cognitive impairment, postural and/or resting tremor, bradykinesia, and rigidity.
- Prevalence
- <1 / 1 000 000
- Inheritance
- Autosomal dominant
- Age of onset
- Adolescent