What Is a Torn Shoulder Labrum?
To compensate for the shallow shoulder socket, the joint has a cuff of cartilage called a labrum that forms a cup for the end of the arm bone. When a patient sustains a shoulder injury, it is possible that the patient has a labral tear. The labrum also becomes more brittle with age and can fray and tear as part of the aging process.
Source: Verywell Health