TOS: Rarely seen by md's. Work group prone are major league pitchers, who develop thoracic outlet syndrome in pitching arm. I have examine two major league pitchers (both without blood clots) & distinct finding was superior trapezium (st) asymmetry. These muscles suspend shoulders. St of pitching arm becomes weak, causing clavicle to approximate first rib & clip subclavian artery and vein.
Answered 9/28/2016
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