The genetic mutation that causes HD is inherited in an autosomal dominant pattern, which means a child of a parent with the HD mutation has a 50% chance of inheriting it.5 The only way to know for sure if a person has the mutated gene that causes HD is through a genetic test.6
There are 2 types of tests available to find
out if you have the mutated gene.7
Predictive testing can be done before symptoms appear and is usually recommended if one or both parents has HD.
Confirmatory testing is done if you already have symptoms and your doctor suspects it might be HD.