possible for symptoms to come on at 76 years old, earlier, or even later. If you are interested, while there is no existing cure for HD, recent research is suggesting that living a healthy and active lifestyle can protect the brain against HD. For more information click here . I hope this answers your question. All the best. For a while now we know that past generations have died from HD... My question is about my mum (64) and her sister (57). The sister had the test and was negative does this mean my mum won't have it? - Stewart (43) Hi Stewart, Unfornutalely your aunty's gene negative result does not influence your mother's gene status. Because one of their parents had HD they both had/have a 50% chance of inheriting the faulty gene. Regrettably, your mother still has a 50% chance of inheriting HD. If she hasn't shown any symptoms yet that is a really good sign but, again, to be sure she is gene negative she would need to go through the genetic testing process. If you feel the need to get more information you should definitely contact your local HD Association. I hope this helps. All the best. Do both parents have to have the gene HD for their child to get HD or just one of the parents? - Megan (18) Hi Megan, Unfortunately it only takes one parent to have the gene in order for their children to be at risk. If somebody is gene