Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooGlenoid Labrum Tear

Neck & Shoulder

What It Is

A glenoid labrum tear (known simply as a labral tear) is a tear to the rim around the edge of the shoulder socket. The labrum is a rim of cartilage tissue that sits around the socket, helping to keep the upper arm in place and to stabilise the shoulder (American Academy of Orthopaedic Surgeons, n.d.).

Heavy trauma to the shoulder, such as a fall while skiing or snowboarding, or a heavy contact in rugby or football, can force the upper arm against the socket and cause a labral tear. Traumatic labral tears often happen when the shoulder dislocates (American Academy of Orthopaedic Surgeons, n.d.).

Some labral tears are related to overuse, especially in athletes who do a lot of overhead throwing or overhead sports, where large forces go through the shoulder repeatedly (American Academy of Orthopaedic Surgeons, n.d.; Rose and Noonan, 2018).

Labral tears can also develop through normal wear and tear of the joint, along with the development of arthritis (American Academy of Orthopaedic Surgeons, n.d.).

How to Spot a Labral Tear

Symptoms can be similar to those of other shoulder injuries. They can include a feeling that the shoulder is unstable, deep shoulder pain (usually with overhead or reaching movements), catching, locking, popping or grinding in the shoulder, pain at night or with daily activities, reduced movement and loss of strength (American Academy of Orthopaedic Surgeons, n.d.).

Diagnosing a labral tear starts with a thorough history of how the problem began. If a heavy trauma has occurred, a labral tear is more likely. If the person is younger and plays a competitive overhead sport, this could also suggest a labral tear.

An MRI scan is the best type of imaging for showing injuries to soft tissues such as the labrum (American Academy of Orthopaedic Surgeons, n.d.). An MR arthrogram (MRA), which is an MRI scan with a contrast dye injected into the joint, can pick up labral tears more reliably than a standard MRI (Rose and Noonan, 2018).

Surgeons can also look inside the joint using a tiny camera, which is known as an arthroscopy, and can repair some labral tears in this way (American Academy of Orthopaedic Surgeons, n.d.).

Glenoid Labrum Tear Anatomy

There are three bones in the shoulder: the shoulder blade (scapula), the upper arm bone (humerus) and the collarbone (clavicle). The head of the upper arm bone rests in a shallow socket on the shoulder blade, called the glenoid. The head of the upper arm bone is much larger than the socket.

The labrum surrounds the socket and helps to stabilise the joint. It deepens the socket by up to 50 percent, which allows the head of the upper arm bone to fit into position better. It is also an attachment point for several ligaments and for one of the tendons of the biceps muscle (American Academy of Orthopaedic Surgeons, n.d.).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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