Thoracic Outlet Syndrome

Thoracic outlet syndrome (TOS) consists of a group of distinct disorders that affect the nerves in the brachial plexus (nerves that pass into the arms from the neck) and various nerves and blood vessels between the base of the neck and axilla (armpit). For the most part, these disorders are produced by positional compression of the subclavian artery and vein, the vertebral artery, and the nerve cords of the brachial plexus. The disorders are complex, somewhat confusing, and poorly defined, ...