Mondo Description Spinocerebellar ataxia type 17 (SCA17) is a rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by a variable clinical picture which can include dementia, psychiatric disorders, parkinsonism, dystonia, chorea, spasticity, and epilepsy.

Uniprot Description Spinocerebellar ataxia is a clinically and genetically heterogeneous group of cerebellar disorders. Patients show progressive incoordination of gait and often poor coordination of hands, speech and eye movements, due to degeneration of the cerebellum with variable involvement of the brainstem and spinal cord. SCA17 is an autosomal dominant cerebellar ataxia (ADCA) characterized by widespread cerebral and cerebellar atrophy, dementia and extrapyramidal signs. The molecular defect in SCA17 is the expansion of a CAG repeat in the coding region of TBP. Longer expansions result in earlier onset and more severe clinical manifestations of the disease.

Disease Ontology Description An autosomal dominant cerebellar ataxia that is characterized by chorea, dementia, dystonia, spasiticity and seizure, has_material_basis_in CAG repeat expansion in the TBP gene.