A Bankart lesion is a specific type of shoulder injury where the fibrocartilaginous labrum tears away from the front (anterior) part of the glenoid rim, often resulting from a shoulder dislocation. This detachment destabilizes the shoulder joint and frequently leads to recurrent dislocations, especially in younger, active individuals. Understanding the anatomy, causes, and treatment options for a Bankart lesion is crucial for effective management and return to function.
The glenoid is the shallow socket of the shoulder blade that holds the ball of the upper arm bone. A ring of cartilage called the labrum deepens this socket and provides stability. When the shoulder dislocates forward, the labrum can peel off from the bony rim, creating a Bankart lesion. This injury is named after the British surgeon Arthur Bankart, who first described it in 1923.
The most common cause of a Bankart lesion is a traumatic anterior shoulder dislocation. The head of the humerus forces forward and shears the labrum off the bone. Athletes in sports like rugby, football, skiing, and gymnastics are at higher risk because of the forces involved. Non-athletes can also sustain a Bankart lesion from a fall on an outstretched arm or a direct blow to the shoulder.
“A single traumatic shoulder dislocation in a young person has a very high chance of causing a Bankart lesion, and without proper treatment, the risk of recurrent dislocation can exceed 80%.”
Patients with a Bankart lesion often describe a specific traumatic event where the shoulder “popped out.” After the initial injury, the shoulder may feel unstable or loose. Common symptoms include:
Diagnosis begins with a thorough history and physical exam. The doctor will check for instability using specific tests like the apprehension test and the relocation test. Imaging is essential to confirm the lesion and assess for bone loss.
| Imaging Modality | What It Shows | Role in Diagnosis |
|---|---|---|
| X-ray | May show a bony Bankart fragment or Hill-Sachs lesion (bone bruise on the humeral head). | Initial screening for fractures and bony defects. |
| MRI Arthrogram | Detailed view of labral tears, cartilage, and soft tissues. | Gold standard for diagnosing soft-tissue Bankart lesions. |
| CT Scan | Excellent for measuring glenoid bone loss. | Used when bone loss is suspected, especially for surgical planning. |
Not all Bankart lesions require surgery. If the tear is small and the shoulder remains stable after the initial dislocation, a course of physical therapy may be attempted. Conservative management focuses on strengthening the rotator cuff and periscapular muscles to compensate for the labral deficiency. However, results are less predictable in young athletes because the healing capacity of the labrum is poor once detached.
“Studies show that non-surgical treatment for a Bankart lesion in patients under 25 leads to a recurrence rate of 40-60% within two years, compared to less than 10% after surgical repair.”
When instability persists or the patient wants to return to high-demand sports, surgical repair is the standard. The most common operation is arthroscopic Bankart repair. The surgeon uses anchors with sutures to reattach the torn labrum back to the glenoid rim. In cases with significant bone loss, a bone graft procedure (Latarjet or iliac crest) may be necessary.
Recovery is a gradual process. The goal is to protect the repair while regaining motion and strength. Most surgeons follow a structured rehabilitation protocol:
Full recovery to pre-injury level usually takes 6 to 9 months, but some overhead athletes may need longer. Adherence to rehabilitation milestones is critical to avoid re-tear.
While surgical outcomes are generally excellent, complications can occur. These include:
With successful surgical repair, the chance of recurrent dislocation is low—usually under 5-10%. Most athletes return to their sport at or near their previous level. However, long-term studies show that even after successful repair, some patients develop mild glenohumeral arthritis over decades. Maintaining shoulder strength and avoiding repetitive trauma can help minimize this risk.
A Bankart lesion is a common injury after traumatic shoulder dislocation, especially in active and young individuals. Prompt diagnosis through clinical exam and imaging is essential. While conservative management may work for some, surgery offers the most reliable solution for restoring stability and preventing recurrent dislocations. Modern arthroscopic techniques have excellent success rates, and with proper rehabilitation, most patients can return to full function. If you experience shoulder instability after a dislocation, seek evaluation by an orthopedic specialist to determine the best treatment plan for your specific situation.
Labral tissue heals poorly because it is avascular (lacking blood supply). Small, stable tears may become asymptomatic with physical therapy, but a full detachment rarely heals back to the bone on its own.
No. A Bankart lesion occurs at the front lower part of the labrum, while a SLAP tear involves the top part of the labrum near the biceps tendon. They are different injuries with different mechanisms and treatments.
You should see a doctor as soon as possible, ideally within a few days. Early evaluation can confirm the diagnosis, reduce the joint safely, and start the right management to prevent recurrent instability.
When the Bankart injury includes a fragment of bone from the glenoid rim, it is called a bony Bankart lesion. This can be seen on X-ray and often requires surgery to restore stability.
Yes. Repeated dislocations or an unrepaired Bankart lesion can lead to abnormal joint forces and long-term cartilage wear. Even after repair, there is a slightly increased risk of osteoarthritis compared to never having the injury.
Untreated, the shoulder often becomes chronically unstable. Recurrent dislocations can damage the cartilage, the humeral head, and other structures, making future treatment more complex and less successful.
No. If the shoulder remains stable after the initial dislocation and you are not a high-demand athlete, a trial of conservative treatment may be reasonable. However, the risk of recurrence is high in young patients, and many eventually choose surgery.
Success rates are high, typically 90-95% for restoring stability. Return to sport is also excellent, with most athletes returning within 6 to 9 months.
It is rare but possible. Some people may have a subluxation (partial dislocation) that causes a labral tear without a full dislocation. In such cases, the injury still needs proper diagnosis and treatment.
Symptoms of instability—like the feeling that the shoulder is “loose” or will pop out—strongly suggest a Bankart lesion rather than a simple sprain. An MRI arthrogram is the definitive way to tell the difference.
