Hi Marie,
I get it now, it is suspected that it is a combination of Parkinson and ataxia. You have a good will to help the medical scientist finding cure. You are brave and strong. Salute!
For your genome test in 2 years ago at Oxford, I am thinking if you can make a step to help by observe and analyze your symptoms. If you are able to manage, try to read more information about Parkinson and ataxia like the cause, symptoms and development; then discuss with doctor. You will learn more and over the time, will have a clear picture on what they are considering. But this is not a easy step as you have to read a lot of medical jargons that you are not familiar, the most important is it may trigger your emotion. So be careful and make sure you feel fit to read.
This is a brief summary about the cause, influence of gene and hereditary of cerebrellar atrophy.
http://www.ataxia.org/learn/ataxia-causes.aspx
There are 28+ types SCA. The tables at pages 15 and 17 will indicate the onset age and if which SCA could be tested clinically. Page 22 right column, criteria for MSA. (Note: Page 12 is the first page in the following link)
http://www.aaf-online.org/php/member_area/hb_online/cds/live/pedNeuro07/documents/bonnemann/brusse%20review%20ataxias%20copy.pdf
Above page 22 reference 58, it is a discussion about MSA. Extracted from page 1 “Multiple system atrophy (MSA) is a degenerative disorder of the central and autonomic nervous systems, characterized by abnormal -synuclein aggregation in oligodendroglia and neurons. Clinically, the cardinal features include autonomic failure, parkinsonism, cerebellar ataxia, and pyramidal signs in any combination….” Please see if there is any possibility to describe your situation.
http://www.movementdisorders.org/publications/rating_scales/umsars.pdf
Other reading
http://ataxia.uchicago.edu/FAQ.aspx
Quite a lot of reading for your, hope it helps. Oh, by the way, a gentle reminder. SCA is available for gene test for 10+ years only, I think the medical history is pretty new. A lot of research are going and a lot of information are available on the internet. I don’t totally rely on what they said as things are keep updating.
Have a nice weekend : )
Charmaine