Huntington disease (HD), which is caused by a triplet-repeat expansion in the IT15 gene (also known as huntingtin or HD), accounts for about 90% of cases of chorea of genetic etiology. In recent years, several other distinct genetic disorders have been identified that can present with a clinical picture indistinguishable from HD, termed HD-like (HDL) syndromes. So far, four genes associated with HDL syndromes have been identified, including the prion protein gene (HDL1), the junctophilin 3 gene (HDL2) and, the gene encoding the TATA box-binding protein (HDL4).
Category
Neurodegenerative disease
Brite
Human diseases in ICD-11 classification [BR:br08403]
08 Diseases of the nervous system
Movement disorders
8A01 Choreiform disorders
H01243 Huntington disease-like syndrome