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'.

My weight was always proportonate to my height - I used to do aerobics, nautilus weights, snow ski and dance my ***** off! yep, those were the days, my friends. My weight didn't start creeping up until (early) menopause and simultaneously my TOS became aparent, starting with painful elbows when lifting the slightest weight. That's when I stopped going to the gym.