Bankart’s lesion involves the of the glenoid labrum –
**Core Concept**
The Bankart lesion is a specific type of injury to the glenoid labrum, which is a cartilaginous structure that surrounds the socket of the shoulder joint. This injury is commonly associated with anterior shoulder dislocations, where the humeral head is displaced anteriorly out of the glenoid cavity.
**Why the Correct Answer is Right**
The Bankart lesion involves a tear of the inferior aspect of the glenoid labrum, typically at the 11 o'clock position in the right shoulder. This occurs due to the mechanism of injury, where the humeral head is forced anteriorly out of the glenoid cavity, leading to a shearing force on the labrum. The labrum is avulsed from the underlying bone, creating a defect that can be visualized on arthroscopic examination.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Bankart lesion specifically involves the glenoid labrum, not the rotator cuff tendons. While rotator cuff injuries can occur in conjunction with Bankart lesions, they are distinct entities.
**Option B:** This option is incorrect because the Hilla-Sachs lesion is a separate injury that occurs on the posterolateral aspect of the humeral head, not the glenoid labrum. It is also associated with anterior shoulder dislocations.
**Option C:** This option is incorrect because the SLAP lesion (Superior Labral Anterior to Posterior lesion) is a type of injury to the superior aspect of the glenoid labrum, not the inferior aspect.
**Option D:** This option is incorrect because the Labral-Biceps Complex (LBC) is a separate anatomical structure that involves the labrum and the biceps tendon, but it is not directly related to the Bankart lesion.
**Clinical Pearl / High-Yield Fact**
The Bankart lesion is a common cause of recurrent anterior shoulder instability, and it is often associated with a history of traumatic anterior shoulder dislocation. Arthroscopic repair of the Bankart lesion is a common treatment option to restore shoulder stability and function.
**Correct Answer:** C.