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Testing for HD

As the symptoms of Huntington disease (HD) do not usually appear until middle age, some people only discover they are at risk when one of their parents or grandparents is diagnosed. A genetic test is available to HD families that can tell people whether or not they have inherited the altered gene, but not the age at which they will start to develop symptoms. Although there is no cure available at the moment, genetic tests can help people at risk of HD make decisions about their future. However most decide not to take the test.

DNA analysis of Huntington disease. Each lane shows a different person's DNA: two bands in the normal (N) range show someone is unaffected. One band in the H range predicts the person will get Huntington disease.
DNA analysis of Huntington disease. Each lane shows a different person's DNA: two bands in the normal (N) range show someone is unaffected. One band in the H range predicts the person will get Huntington disease.
Department of Neurogenetics, Institute of Neurology, London

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