A Bankart lesion, aka glenoid labrum tear, is where there is damage to the special layer of cartilage lining the shoulder joint.
A bankart tear usually occurs when the shoulder dislocates forwards and most commonly affects young athletes.
Damage to the labrum makes the shoulder more prone to instability and there is a high risk of further shoulder dislocation without appropriate treatment.
Bankart lesions are named after English Orthopedic Surgeon Arthur Sydney Blundell Bankart, 1879-1951, who first described the injury and the surgical repair process.
Here we will look at the common causes, associated injuries, symptoms and treatment options, both surgical and non surgical, for a Bankart lesion labrum tear.
To fully understand Bankart lesions, we need to first understand the structure of the shoulder. The shoulder joint, aka glenohumeral joint, is a ball and socket joint, similar to the hip joint. It is made up of the:
The shoulder socket is very shallow, much shallower than the hip socket. This is because the shoulder needs to be able to move in multiple directions through a huge range of movement.
Imagine a golf ball sitting on top of a golf tee, not very stable. So around the rim of the socket is a special band of cartilage known as the glenoid labrum. This labrum is made of fibrocartilaginous material and works to deepen the socket to improve the connection of the joint and improve shoulder stability without restricting mobility.
A Bankart lesion is when there is damage to the lower portion of the glenoid labrum, causing it to tear away from the bony socket.
Bankart lesions are typically caused by an anterior dislocation of the shoulder, where the head of the humerus is forced forwards and pops out of the glenoid socket. As the bone is forced forwards, it can damage the labrum, causing it to tear.
Approximately 95% of Bankart lesions are due to anterior shoulder dislocations, typically caused by:
Bankart lesions are often caused by a fall onto an outstretched arm, particularly if the arm is:
Falls are the most common cause of anterior shoulder dislocations in older patients and thus Bankart lesions. Road traffic accidents (RTA’s) are another traumatic cause of shoulder dislocations.
Another common cause of anterior shoulder dislocations and bankart tears are contact injuries e.g. football or rugby tackles, particularly when the arm is above the head and the elbow is pushed backwards. Repetitive arm movements above the head e.g. throwing or overhead racket sports such as tennis are another common cause.
Sporting injuries are the most common cause of a glenoid labrum tear in younger patients.
When the shoulder dislocates anteriorly, other structures may also be damaged, alongside a Bankart lesion such as:
The joint capsule, a special sac that sounds the glenohumeral joint, may also be damaged, as may be the surrounding ligaments, most commonly the inferior glenohumeral ligament.
These all increase the risk of further shoulder instability which makes the shoulder more prone to further injury.
Common symptoms of a Bankart lesion include:
There are two treatment options for Bankart lesions, surgical and non-surgical. The right treatment will depend on factors such as age, activity levels and levels of instability.
Bankart repair surgery tends to be the treatment of choice for younger patients with a Bankart lesion, especially those who play sports, as there is a high risk of the shoulder dislocating again. This is because the glenoid labrum tear often fails to heal properly, so doesn’t provide the extra depth to the socket that is needed, reducing the stability and increasing the risk of further dislocation.
A Bankart lesion repair is usually carried out arthroscopically (hey hole surgery) under general anaesthetic. The labral tear surgery aims to repair and tighten overstretched and damaged ligaments, joint capsule and cartilage.
Suture anchors are placed in the bone and the torn glenoid labrum is reattached to the glenoid fossa. You can usually go home the same day, or the following day after a Bankart repair.
A sling will need to be worn (including when you sleep) to protect the shoulder for the first few weeks and allow it to heal in the correct position. Physical therapy will be started almost immediately to regain strength, stability and movement. You will be given a rehab programme to follow, progressing to more challenging exercises over time. It usually takes around 4-6 months to recover completely from a Bankart repair and be able to return to contact sports.
Bankart shoulder repair surgery has an approximately 85-90% success rate, with most people returning to their pre-injury activity levels. Outcome tends to be slightly better when surgery is carried out soon after the initial labrum tear, rather than further down the line.
For older patients, or those who are less active, non-surgical treatment is recommended for a Bankart lesion.
The arm is immobilized in a sling for a few weeks, usually with the arm resting across the front of the body in internal rotation (turned inwards) and a small pillow under the armpit to hold the arm slightly away from the body.
This is then followed by intensive physical therapy to regain the strength, stability and mobility of the shoulder with a combination of:
One of the problems with this treatment method is that in this rest position, the glenoid labrum tends to heal in slightly the wrong place, so the socket depth is reduced, making the shoulder more prone to recurrent dislocations.
Except for young athletes, the advice is often to try non-surgical therapy first with a bankart lesion. If the shoulder does re-dislocate, then bankart repair surgery would be advised.
A Bankart lesion is just one possible cause of shoulder pain and instability. The upper part of the glenoid labrum may also be damaged, known as a SLAP tear causing pain and instability with overhead movements.
Other possible causes of upper arm pain include:
You can find out more about other causes in the Common Shoulder Problems section. If you don't think a Bankart lesion sounds quite like your problem, check out the shoulder pain diagnosis section for help working out what is going on.
Page Last Updated: 18/05/2022
Next Review Due: 18/05/2024