A Hill-Sachs lesion is best described as which of the following?

• A. Fracture of the distal radius
• B. Impaction of the posterolateral humeral head
• C. Detachment of labrum from glenoid
• D. Fracture of the greater tubercle

Answer: (B)

A Hill-Sachs lesion is an injury pattern seen with shoulder dislocations, specifically an impaction fracture of the posterolateral humeral head. When the humeral head dislocates anteriorly and crashes into the anterior rim of the glenoid, it creates a dent on the posterolateral surface of the humeral head. This indentation is the Hill-Sachs lesion. It is bone damage on the humeral head, not a labral tear or a fracture of the distal radius or greater tubercle.