It's been about 4.5 years for me. TOS happened after a clavicle surgery. I may be getting surgery but I'm worried about that. For me the surgery is more involved with trying to deal with the clavicle since that isn't healed right and has hardware and donor bone. There are times when I feel my arm is a problem but maybe just annoying and I can deal with it and other times where it is excruciating pain, other times it is just that it very quickly becomes tired and heavy. Seems every little thing gets it going but if I just lay down or leave it rest in comfortable position it is ok. Even just the weight of the arm pulling on the shoulder causes problems. It is hard to weigh the risks of trying to get it fixed, the potential for a good outcome vs doing nothing.