The glenoid labrum is a fibrocartilaginous structure located in the shoulder joint. It surrounds the shallow socket of the glenoid, which is part of the scapula (shoulder blade). The labrum deepens the socket, providing stability to the joint and helping to hold the humerus (upper arm bone) in place. In addition to enhancing stability, the glenoid labrum serves as an attachment point for ligaments and tendons, contributing to the overall function of the shoulder. Injuries to the labrum can lead to pain and instability, often requiring medical evaluation and treatment.