Thanks, Jo*mar. I have reposted this on the Spinal forum, as you suggested.

Unfortunately, I can't ask for a new MRI to compare with the old results because my old results are in the UK and I have since emigrated to Sweden.

I am a university teacher, but I do spend a great deal of time on a PC, especially at the moment, because I am busy doing linguistic research and writing an academic paper. You have a good point about my posture- it's not good.

I will check out thoracic outlet syndrome (never heard of it!!) - my firstthought was CSM because my mother had that and I understand it can be hereditary.

Bisonex