Which joint is involved in a Hill-Sachs lesion?

Which joint is involved in a Hill-Sachs lesion?

• A. Glenohumeral (shoulder) joint
• B. Acromioclavicular joint
• C. Elbow joint
• D. Sternoclavicular joint

Answer: (A)

Hill-Sachs lesion is an impression fracture of the humeral head that occurs when the shoulder is dislocated anteriorly. The injury happens as the humeral head is driven against the rim of the glenoid cavity, creating a dent on the posterolateral part of the humeral head. Because this lesion stems from the interaction between the humeral head and the glenoid, the joint involved is the glenohumeral (shoulder) joint. The other joints listed—acromioclavicular, elbow, and sternoclavicular—aren’t where this type of injury occurs.

Hill-Sachs lesion is an impression fracture of the humeral head that occurs when the shoulder is dislocated anteriorly. The injury happens as the humeral head is driven against the rim of the glenoid cavity, creating a dent on the posterolateral part of the humeral head. Because this lesion stems from the interaction between the humeral head and the glenoid, the joint involved is the glenohumeral (shoulder) joint. The other joints listed—acromioclavicular, elbow, and sternoclavicular—aren’t where this type of injury occurs.