The thoracic outlet is the area of the lower neck and upper chest. This area has a variety of nerves, blood vessels, muscles and bones that run through a fairly small area. When the nerves and blood vessels of this area are compressed, irritated or injured they can cause a range of symptoms known as the thoracic outlet syndrome (TOS).

Thoracic Outlet Syndrome
exh39732_96472_1
Copyright © Nucleus Medical Media, Inc.

Compression, injury, or irritation of nerves and blood vessels can be caused by:

  • Defects in nearby structures
  • Poor posture
  • Trauma
  • Repetitive arm or shoulder movement
  • Tumors