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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.
The labrum is a type of cartilage found in the shoulder joint. The shoulder is a ball-and-socket joint where the arm meets the body. The arm bone (humerus) forms a ball at the shoulder that meets the socket, which is part of the shoulder blade.