The sternoclavicular joint is located where the collarbone meets the chest’s sternum, or breastbone. It is one of the four joints that complete the shoulder. The SC joint mainly facilitates the arm’s forward movement, such as when pushing.
Sternoclavicular arthritis is much less common than osteoarthritis in the glenohumeral shoulder joint or acromioclavicular joint of the shoulder. Some patients with ankylosing spondylitis may experience symptoms at the sternoclavicular joint.