Sports Medicine: Shoulder Labrum Tears
Tears to the specialized cartilage tissue in the shoulder known as the labrum can cause pain and instability in the shoulder. What Is The Shoulder Labrum? The labrum is a cup-shaped rim of cartilage that lines and reinforces the ball-and-socket joint of the shoulder. The shoulder joint is composed of the glenoid (the shallow shoulder "socket") and the head of the upper arm bone known as the humerus (the "ball").