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X-rays of the left shoulder of a 25 year old male who had a dislocation when trying to get up from his bed.

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  Anteroposterior projection shows a shoulder dislocation.
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  Y-projection shows anterior dislocation
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  Anteroposterior projection after reduction, with internal rotation, showing a bony Bankart lesion and a Hill–Sachs lesion.
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  Y-projection.

The bony Bankart lesion is new, as evidenced by lack of cortex on the superior part of the fragment, and is presumed to be caused by glenohumeral ligaments pulling the humerus towards the glenoid as the shoulder dislocates, causing a fracture even without significant external forces. The Hill-Sachs lesion may be old, since the patient had previous shoulder dislocations.