Huntington's disease.
D000328:Adult; D000367:Age Factors; D002421:Caudate Nucleus / Q000473:pathology; D002905:Chromosomes, Human, 4-5; D004200:Diseases in Twins; D005786:Gene Expression Regulation; D005799:Genes, Dominant; D006801:Humans; D006816:Huntington Disease / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D009410:Nerve Degeneration; D011699:Putamen / Q000473:pathology