Bony Bankart lesion is characterized by which combination?

• A. Labral tear and fracture of the anterior-inferior glenoid rim; it typically occurs during traumatic anterior shoulder dislocation when the humerus crashes into the socket edge.
• B. Compression fracture of posterosuperior humeral head causing anterior dislocation.
• C. Compression fracture of anterosuperomedial humeral head causing posterior instability.
• D. Fracture of the posterior glenoid rim without labral tear

Answer: (A)

Bony Bankart lesion combines a labral tear with a fracture of the anterior-inferior glenoid rim. It happens after a traumatic anterior shoulder dislocation when the humeral head drives into the rim, tearing the labrum off and avulsing a piece of bone from the glenoid. This bone loss on the glenoid reduces the joint’s stability and increases recurrence risk, so treatment may need to address both the labral injury and the bony fragment. The other descriptions describe injuries that either involve different parts of the humeral head or glenoid rim, or describe posterior instability, which aren’t characteristic of a Bankart lesion.