Interesting poll. I haven't voted within it because I've no idea what the causal factor or factors are for my TOS. I do work with a desk+computer for up to 8 hours a day, haven't had a recent accident or other acute stimulus for an injury, and have no extra cervical rib or abnormality, so work-related appears to be the most probable choice.

For those that know for certain that their TOS is work related, how do you know? Is it merely a case of picking the most likely culprit once other likely cases are eliminated? My neurologist did not attempt to deduct the cause of my TOS and neither has my phyiso. I do have the feeling that knowing the cause would be helpful but don't know how to achieve any level of certainty.