Nobody has told me specifically what I have actually. I labelled it ATOS since tests revealed that my subclavian artery is being compressed. That said, my symptoms are all neurological (pain in shoulder, upper arm), not arterial (cold hands, etc).

I'd actually gather that I'm more neurological. It's my understanding that the brachial plexus envelopes the subclavian artery, so if the artery is getting compressed, there's a good bet the nerves are as well and thus, the symptoms.

KY