Spinocerebellar ataxia type 26 (SCA26) is a very rare subtype of autosomal dominant cerebellar ataxia type III (ADCA type III) characterized by late-onset and slowly progressive cerebellar signs (gait ataxia) and eye movement abnormalities. The disease is Monarch Disease Ontology entry MONDO_0012246 (spinocerebellar ataxia type 26). Also known as: SCA26.