The term "Hill-Sachs lesion" refers to what type of injury resulting from an anterior shoulder dislocation?

A Hill-Sachs lesion specifically refers to a compression fracture of the humeral head that occurs when there is an anterior shoulder dislocation. This injury happens as the humeral head collides with the edge of the glenoid cavity during dislocation. The result is a characteristic defect or indentation on the surface of the humeral head, which can be identified on imaging studies such as X-rays or MRIs.

This type of lesion is significant because it can contribute to shoulder instability and may increase the risk of recurrent dislocation. Understanding this injury is important for managing shoulder dislocations effectively and addressing potential complications in patient care.

While other injuries related to shoulder dislocations, like fractures of the glenoid, scapula, or clavicle, are possible, they do not define the Hill-Sachs lesion, which is specifically the indentation on the humeral head.