The science and practice of testing for Huntington's disease
How accurate is the genetic test for HD?
A positive or negative genetic test result for HD is 98-99% accurate. The genetic test is not absolutely 100% accurate because of the possibility of human or technical error that is unavoidable in laboratory procedures. A test result that shows an intermediate range of CAG repeats does not show whether or not an individual will develop HD. If an individual requests, repeat testing can sometimes be performed in order to confirm the accuracy of test results.
Last Modified: 9-13-02
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