Distal clavicle osteolysis refers to a pathologic process that affects the end (ie the distal part) of the collarbone (also known as the clavicle). The terminal osteolysis literally means “resorption of bone”. In distal clavicle osteolysis, the end of the collarbone becomes inflamed and ultimately resorbed.
The exact etiology of the distal clavicle osteolysis is unclear. Distal clavicle osteolysis can follow an acute traumatic injury to the AC joint. More commonly, however, distal clavicle osteolysis occurs in patients who perform repetitive heavy weightlifting exercises, such as bench press, military press, or dips.
The bones of the shoulder girdle create two distinct joints: 1) the glenohumeral joint is the ball and socket joint, where most of the shoulder motion occurs; 2) the acromioclavicular (AC) joint is where the collar bone (clavicle) attaches to the shoulder blade (acromion).
