Thanks for this Tam, good for newbies to read. I suggest if you are new to TOS, you search on "all posts" of members like Tshadow, Astern, HorizontalOne, DeMarie, Beth, etc., etc... Pick a member who's posts ring a bell with your situation.

My TOS was strictly caused by bi-lateral c-ribs, fiberous bands and an extra scalene. All things I consider 'birth defects' or 'genetic anomalies'. Had limited use of arms all my life, but symptoms didn't present until I was about 38.

Sorry I can't jump in and post more. I'm having a recurrence of symptoms and have to limit computer time.

A.