MONDO_0008458 (spinocerebellar ataxia type 2) is a subtype of type I autosomal dominant cerebellar ataxia (ADCA type I) characterized by truncal ataxia, dysarthria, slowed saccades and less commonly ophthalmoparesis and chorea. Also known as: ATXN2 autosomal dominant cerebellar ataxia type I, OPCA2, SCA2, autosomal dominant cerebellar ataxia type I caused by mutation in ATXN2.