What is the glenoid labrum, and what are the symptoms of a labral tear?
The glenoid labrum is fibrocartilagenous tissue around the rim of the glenoid. It results in deepening of the glenoid fossa, increasing stability of the inherently unstable shoulder joint, and also serves as a site for ligament attachments. The normal labrum is low in signal intensity on all pulse sequences and is most commonly triangular-shaped in cross-section. Symptoms of labral tear include pain with overhead activities, a locking or popping sensation, decreased range of motion, and a sense of shoulder instability.