Rare hereditary ataxia Autosomal dominant cerebellar ataxia type 3 ADCAIII ICD10:G11.8 orphanet Pure cerebellar syndrome - mild pyramidal signs Autosomal dominant cerebellar ataxia type III ADCA3 Autosomal dominant cerebellar ataxia (ACDA; see this term) type 3 is a group of neurodegenerative disorders characterized by mostly pure cerebellar syndromes with occasional non-cerebellar signs (e.g. pyramidal signs, peripheral neuropathy, writer's cramp) and includes spinocerebellar ataxia (SCA) type 5 (SCA5), SCA6, SCA11, SCA26, SCA30, and SCA31 (see these terms). Late-onset ataxia with dementia Spinocerebellar ataxia with oculomotor anomaly