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The glenoid labrum (glenoid ligament) is a fibrocartilaginous rim attached around the margin of the glenoid cavity in the shoulder blade.
Tears of the labrum from the front-bottom portion of the glenoid typically occur with a dislocated shoulder. This particular tear is coined a Bankart lesion. The major stabilizing ligaments of the shoulder attach to this portion of the labrum, the inferior glenohumeral ligaments (IGHL). Tears of the posterior labrum can occur either from a dislocation, fall, or overhead sports. Tears cause laxity of the capsule at the top-back portion or the inferior glenohumeral ligament (IGHL) at the bottom-back portion of the shoulder. Posterior Labral Tear and Instability.