Hill-Sachs lesion is seen in:March 2005, March 2013 (h)
**Core Concept**
A Hill-Sachs lesion refers to an indentation or compression fracture of the posterolateral humeral head, typically resulting from a fall onto an outstretched hand or a direct blow to the shoulder. This condition is associated with anterior shoulder dislocation, where the humeral head is displaced anteriorly relative to the glenoid cavity.
**Why the Correct Answer is Right**
During anterior shoulder dislocation, the humeral head impinges against the anteroinferior aspect of the glenoid rim, leading to a compression fracture of the posterolateral humeral head. This injury is a common complication of shoulder dislocation and can cause persistent shoulder instability and pain. The pathophysiology involves the direct trauma to the humeral head, which results in a bony defect.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a Bankart lesion is a different type of injury that involves the anteroinferior labrum of the glenoid cavity, not the humeral head. A Hill-Sachs lesion occurs in the humeral head, whereas a Bankart lesion occurs in the glenoid labrum.
**Option B:** This option is incorrect because a rotator cuff injury typically involves the tendons surrounding the shoulder joint, not the bony structure of the humeral head. Hill-Sachs lesions are a distinct type of injury that requires specific clinical and radiological findings.
**Option C:** This option is incorrect because a clavicle fracture is a separate injury that occurs in the collarbone, which is a distinct anatomical structure from the humeral head. While both injuries can occur in the shoulder region, they are distinct entities.
**Clinical Pearl / High-Yield Fact**
A Hill-Sachs lesion should be suspected in patients with a history of anterior shoulder dislocation, particularly if they present with persistent shoulder pain and instability. It is essential to include this diagnosis in the differential for patients with shoulder injuries to ensure proper management and treatment.
**Correct Answer: D. Hill-Sachs lesion is seen in anterior shoulder dislocation.**