Bankart fracture refers to detachment of which structure?

• A. Detachment of the labrum from the glenoid
• B. Hill-Sachs lesion
• C. Fracture of clavicle
• D. Dislocation of acromioclavicular joint

Answer: (A)

This question tests understanding of a Bankart lesion in the context of shoulder dislocations. A Bankart lesion is the detachment of the anteroinferior portion of the glenoid labrum from the rim of the glenoid. The labrum helps deepen the socket and stabilize the shoulder, so when it peels away after an anterior dislocation, instability follows. Sometimes a small piece of bone from the glenoid rim is pulled off with the labrum, which is called a bony Bankart fracture. The other options describe different injuries: a Hill-Sachs lesion is a dent in the humeral head from the dislocation’s impact, a clavicle fracture is a separate injury, and an AC joint dislocation is not about the labrum.