Huntington's disease of young people.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis; D002675:Child, Preschool; D002819:Chorea / Q000175:diagnosis; D005260:Female; D005621:Friedreich Ataxia / Q000175:diagnosis; D006801:Humans; D006816:Huntington Disease / Q000175:diagnosis* / Q000453:epidemiology; D008607:Intellectual Disability / Q000175:diagnosis; D008297:Male; D008875:Middle Aged