Hi Fizzbuzz.
I started a similar thread to this a few months ago and we spoke then. I had another name then but i remember your sister's story. How is she now?
I've had suspicions for about 10 years, confirmed by other members of the family who also had suspicions about 1-2 years ago. I think it's only been a year since i discussed it properly with her partner.
I'm absolutely sure she has it. We spoke before about the behavioural part of the disease in that thread a few months ago. Also, like you said about your sister showing personality disorder from a young age, my mum has thrown suicidal tantrums and been odd for as long as i've known her too.
I have known that HD was in the family and what that meant for my mother and my brothers and sisters since my Grandmother was diagnosed. I think i was about 9 years old. It was the first my mum had heard of it as her grandmother had died before she became ill, so it wasn't known to be in the family until then.
Wannabe, yes, I will be telling my children as soon as they are old enough to process the info, or as soon as they are asking questions about what is up with granny? I think it helped me to know about it since i was a child as opposed to finding out later in life. It's been hard to deal with and has caused me a lot of worry but I think it would be worse if had been kept a secret from me. It also meant i could discuss it with DH before we committed to having children.
I think i will consider testing when i am 40-45ish although it's a situation i review fairly regularly. That way i will be able to recognise symptoms as they arise and will know if i am likely to be a danger driving etc. The decision to be tested is a huge one and not to be rushed into i understand that. If I was seriously considering it I would have to go through a counselling process first I think. But I really am sure that i don't want to know right now.
I wonder if i'll still be mumsnetting in 20 years and typing badly because of my chorea and telling you all to eff off.