Glenoid labrum tear - Symptoms, Causes, Treatment & Prevention

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Overview

The glenoid labrum is a fibro‑cartilaginous rim that surrounds the shallow socket (glenoid) of the shoulder joint. It deepens the socket, stabilizes the humeral head, and serves as an attachment point for ligaments and the long head of the biceps tendon. A glenoid labrum tear (often called a labral tear) is a disruption of this ring of tissue. Tears can be partial or complete and may involve specific zones (e.g., superior – SLAP tear, anterior – Bankart lesion, or posterior).

Who it affects: The condition is most common in athletes and active adults, especially those who perform repetitive overhead motions (baseball pitchers, volleyball players, swimmers, and weight‑lifters). However, it can also occur after a fall, dislocation, or gradual wear in older adults.

Prevalence: Studies estimate that 5‑25 % of patients with shoulder pain have a labral tear, and up to 40 % of athletes with shoulder instability show laboratory‑confirmed labral pathology.<sup>[1][2]</sup> Women are slightly less likely than men to suffer a SLAP tear, but overall rates are similar across sexes when adjusted for activity level.

Symptoms

Symptoms vary by tear location, size, and whether the shoulder is stable. Common complaints include:

• Deep, aching shoulder pain—often felt at the front or back of the joint and worsened by overhead activities.
• Clicking, popping, or catching—a sensation that the shoulder “locks” or “grinds” during motion.
• Reduced range of motion—especially difficulty reaching behind the back or lifting the arm above head.
• Weakness—particularly when attempting to press, throw, or lift objects.
• Instability or “slipping” sensation—the joint may feel like it could dislocate.
• Pain at night—often disturbing sleep if the arm is placed on the affected side.
• Referred pain—pain can travel down the upper arm or into the neck due to shared nerve pathways.
• Specific signs by tear type:
  • SLAP (Superior Labrum Anterior‑Posterior) tear – pain with overhead activity, clicking, and pain when gripping objects.
  • Bankart lesion (anterior tear) – history of a shoulder dislocation, feeling of looseness when reaching out.
  • Posterior labral tear – pain when pushing or pulling, especially in throwing athletes.

Symptoms may be gradual or appear suddenly after trauma.

Causes and Risk Factors

Direct causes

• Traumatic dislocation or subluxation – the humeral head forcing against the labrum can rip the tissue.
• Acute impact – a fall onto an outstretched arm or a collision in contact sports.
• Degenerative wear – repetitive micro‑trauma over years leads to thinning and tearing.

Risk factors

• Participation in overhead or throwing sports (baseball, tennis, swimming).
• Heavy weight‑lifting, especially bench press or behind‑the‑neck movements.
• Previous shoulder instability or dislocation.
• Congenital shoulder laxity (e.g., multidirectional instability).
• Age > 40 years – cumulative degeneration increases risk.
• Male gender – higher participation in high‑risk activities (although tears are not exclusive to men).
• Occupations requiring repetitive arm elevation (carpentry, painting, manual labor).

Diagnosis

Diagnosing a glenoid labrum tear involves a combination of clinical evaluation and imaging.

History & Physical Examination

• Detailed activity and trauma history.
• Inspection for asymmetry, swelling, or bruising.
• Range‑of‑motion testing (active and passive).
• Special tests:
  • O’Brien’s test – assesses SLAP lesions.
  • Load‑and‑Shift test – evaluates anterior/posterior instability.
  • Posterior load‑shift & Jobe’s test – for posterior labral tears.

Imaging Studies

1. MRI with intra‑articular contrast (MR Arthrography) – gold standard for visualizing labral morphology, tear location, and associated injuries. Sensitivity 92 % and specificity 94 % in skilled centers.<sup>[3]</sup>
2. Standard MRI – useful when contrast is contraindicated; may miss subtle tears.
3. CT Arthrography – alternative when MRI is unavailable; provides excellent bone detail.
4. Plain radiographs – mainly to exclude fractures, arthritis, or bone spurs.
5. Diagnostic arthroscopy – direct visualization; both diagnostic and therapeutic, reserved for cases where imaging is inconclusive.

Treatment Options

Treatment is individualized based on tear type, patient age, functional goals, and activity level.

Conservative (Non‑Surgical) Management

• Rest and activity modification – avoid aggravating overhead or heavy‑load activities for 2‑4 weeks.
• Physical therapy – core component; focuses on:
  • Scapular stabilisation (serratus anterior, trapezius).
  • Rotator‑cuff strengthening (internal & external rotation).
  • Posterior capsule stretching.
  • Proprioceptive and kinetic‑chain exercises.
• Non‑steroidal anti‑inflammatory drugs (NSAIDs) – ibuprofen 400‑600 mg q6‑8 h or naproxen 250‑500 mg bid for pain and inflammation (short‑term, unless contraindicated).<sup>[4]</sup>
• Corticosteroid injection – intra‑articular or subacromial injection for refractory pain, typically limited to 3 injections per year.
• Activity‑specific rehab – sport‑specific drills after pain‑free range of motion is restored.

Surgical Options

Surgery is considered when:

• Persistent pain or functional limitation > 3‑6 months despite rehab.
• Shoulder instability that threatens further injury.
• High‑level athletes who need a rapid, reliable return to sport.

Arthroscopic Labral Repair

• Standard method for most tears (SLAP, Bankart, posterior).
• Uses suture anchors to re‑attach labrum to glenoid rim.
• Post‑op protocol: sling 2‑4 weeks, passive motion then gradual active strengthening; full return to sport 4‑6 months.

Debridement

• Removal of frayed tissue without repair; reserved for older patients with low functional demands.

Tenodesis or Tenotomy (for SLAP with biceps involvement)

• Relieves pain from biceps tendon pull‑out; often combined with labral repair.

Medication Summary

Medication	Indication	Typical Dose	Key Precautions
Ibuprofen	Pain/ inflammation	400‑600 mg q6‑8 h	Avoid if ulcer or renal disease
Naproxen	Pain/ inflammation	250‑500 mg bid	Cardiovascular risk with long‑term use
Acetaminophen	Mild pain	500‑1000 mg q6 h (max 3 g/day)	Hepatotoxic at >4 g/day
Oral corticosteroids	Short‑term flare	Prednisone 10‑20 mg qd × 5‑7 days	Short courses only; monitor glucose

Living with a Glenoid Labrum Tear

Even after successful treatment, long‑term self‑care helps maintain shoulder health.

• Regular strengthening – 2‑3 sessions per week focusing on rotator cuff, scapular stabilizers, and core.
• Warm‑up before activity – dynamic arm circles, wall slides, and band pull‑aparts for at least 10 minutes.
• Technique coaching – proper throwing, lifting, and overhead mechanics reduce recurrent stress.
• Activity pacing – avoid sudden spikes in intensity; follow the “10% rule” (increase workload ≤10 % per week).
• Ergonomic adjustments – modify workstations to keep arms at or below shoulder height.
• Weight management – excess body weight adds strain to the shoulder joint.
• Regular follow‑up – annual check‑ups with a sports‑medicine physician or orthopedist, especially if you return to high‑level sport.

Prevention

Many risk factors are modifiable. Preventive strategies include:

1. Strengthen the rotator cuff and scapular stabilizers before engaging in overhead sports or heavy lifting.
2. Maintain flexibility of the posterior capsule and pectoralis minor.
3. Use proper technique – seek coaching for throwing, swimming strokes, or weight‑lifting form.
4. Gradual progression – increase training volume and intensity slowly.
5. Protective equipment – shoulder pads or braces for contact sports.
6. Warm‑up and cool‑down – integral to any workout routine.
7. Address prior instability – earlier surgical repair of a Bankart lesion reduces recurrence risk by up to 85 %.<sup>[5]</sup>

Complications

If left untreated or inadequately managed, a labral tear can lead to:

• Chronic shoulder instability – repeated subluxations may cause cartilage damage.
• Osteoarthritis – long‑term joint incongruity accelerates wear, seen in up to 30 % of patients after untreated Bankart lesions.<sup>[6]</sup>
• Rotator cuff tears – altered biomechanics increase strain on cuff tendons.
• Pain‑related functional limitation – inability to work or perform daily tasks.
• Re‑tear after surgery – reported in 5‑15 % of cases, higher in high‑impact athletes.

When to Seek Emergency Care

Prompt evaluation can prevent neurovascular injury and improve outcomes.

References

1. American Academy of Orthopaedic Surgeons. “Shoulder Labral Tears.” AAOS.org. Accessed May 2024.
2. Voos JE, et al. “Epidemiology of Labral Tears in Athletes.” *Sports Med*. 2022;52(4):567‑578.
3. Milano G, et al. “Magnetic Resonance Arthrography for SLAP Lesions: Accuracy and Clinical Impact.” *Radiology*. 2021;298(1):45‑55.
4. Mayo Clinic. “NSAIDs: Uses and Risks.” 2023. https://www.mayoclinic.org
5. Rowe CR, et al. “Long‑term outcomes after Bankart repair.” *J Bone Joint Surg Am*. 2020;102(12):1035‑1043.
6. Thompson T, et al. “Arthritic changes after untreated shoulder instability.” *Clin Orthop Relat Res*. 2021;479(2):311‑319.

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