Scapulothoracic disorders

Abstract

Subscapular bursitis or “snapping scapula syndrome” is an inflammatory condition of the subscapular bursae that results in pain and crepitus. It was originally described by Boinet and Milch, who noted an abnormal forward curvature of the superomedial border of the scapula as a possible culprit. Morse later described two causes of subscapular irritation: soft tissue and bone. The soft tissue component consisted mostly of bursitis or muscle irritation, while the bony causes dealt more with articular incongruence of the scapulothoracic joint. Osteophytes, abnormal scapular shape, or space-occupying lesions can all result in compromised scapulothoracic articulation.