I have SCA2. My 2 boys were tested and do not have it. I know it was a 50-0 chance they could get it. It is such a relief to know that is one struggle in life they will not have. I still wrestle with the fact my dad passed it on to my brother and myself. Life is good and wonderful. I guess I will always wonder why. I have had it for 15 years. Each year presents new challanges.