Huntington's disease is caused by an inherited defect in a single gene. Huntington's disease is an autosomal dominant disorder, which means that a person needs only one copy of the defective gene to develop the disorder.
With the exception of genes on the sex chromosomes, a person inherits two copies of every gene — one copy from each parent. A parent with a defective Huntington gene could pass along the defective copy of the gene or the healthy copy. Each child in the family, therefore, has a 50 percent chance of inheriting the gene that causes the genetic disorder.
July 24, 2014
- Ferri FF. Ferri's Clinical Advisor 2014: 5 Books in 1. Philadelphia, Pa.: Mosby Elsevier; 2014. https://www.clinicalkey.com. Accessed Jan. 27, 2014.
- Tabrizi SJ, et al. Predictors of phenotypic progression and disease onset in premanifest and early-stage Huntington's disease in the TRACK-HD study: Analysis of 36-month observational data. The Lancet. 2013;12:637.
- Huntington's disease: Hope through research. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/huntington/huntington.htm. Accessed Jan. 27, 2014.
- Suchowersky O. Huntington disease: Clinical features and diagnosis. http://www.uptodate.com/home. Accessed Jan. 27, 2014.
- Huntington disease. The Merck Manuals: The Merck Manual for Health Care Professionals. http://www.merckmanuals.com/professional/neurologic_disorders/movement_and_cerebellar_disorders/huntington_disease.html. Accessed Jan. 29, 2014.
- Huntington's disease: A family guide. Huntington's Disease Society of America. http://www.hdsa.org/living-with-huntingtons/publications/index.html. Accessed Jan. 29, 2014.
- Novak MJ, et al. Huntington's disease. British Medical Journal. 2010;340:c3109.
- Suchowersky O. Huntington disease: Management. http://www.uptodate.com/home. Accessed Jan. 29, 2014.
- Bower JH (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 5, 2014.
- Knopman DS (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 5, 2014.