Shoulder Proximal Biceps Tendon Rupture

The biceps muscle has two tendons that anchor it at the shoulder:

• The long head of the biceps tendon travels through a groove in the front of the upper arm bone (humerus) and attaches deep inside the shoulder joint at the top of the glenoid labrum.
• The short head of the biceps tendon attaches to a nearby area on the coracoid process of the shoulder blade.

At the elbow, the distal biceps tendon attaches to the radial tuberosity, allowing the muscle to flex the elbow and rotate the forearm.

The long head tendon is more prone to tearing because it experiences constant friction as it passes through the shoulder joint. Over time, repetitive overhead activity, lifting, or degenerative wear can weaken the tendon until it finally gives way.

Proximal biceps ruptures are relatively common, particularly among men over 40 and individuals who engage in heavy lifting or repetitive overhead work. They can occur as a result of:

• Sudden injury, such as lifting a heavy object or catching a falling weight.
• Chronic wear and tear, often associated with shoulder conditions like impingement or rotator cuff disease.
• Repetitive overhead sports, such as baseball, swimming, or tennis.

Other risk factors include:

• Smoking, which decreases tendon blood supply.
• Corticosteroid use (local or systemic), which can weaken tendon tissue.
• Metabolic conditions, such as diabetes.

In many patients, the tendon has been degenerating quietly for years before finally rupturing during a simple motion like lifting a grocery bag or starting a lawnmower.

Diagnosis begins with a thorough evaluation of the shoulder and arm. Dr. José Vega, Cleveland’s trusted shoulder specialist, will review how the injury occurred, assess symptoms, and perform a focused physical exam.

Typical signs and symptoms include:

• Sudden pain or “popping” sensation in the shoulder or upper arm
• Bruising and swelling along the front of the arm
• A visible bulge in the upper arm (Popeye deformity)
• Weakness in elbow flexion or forearm rotation (supination)
• Cramping or fatigue with lifting

During the exam, Dr. Vega will test shoulder and arm strength, palpate the tendon, and assess for other shoulder problems—especially rotator cuff tears, which can occur in combination with a biceps rupture.

Imaging studies are often used to confirm the diagnosis:

• Ultrasound can quickly identify tendon discontinuity or retraction.
• MRI provides a detailed view of the shoulder joint and can detect associated rotator cuff or labral pathology.

Treatment depends on the patient’s age, activity level, and functional goals.

Nonsurgical treatment is often appropriate for older or less active individuals who retain good strength and range of motion. This approach may include:

• Rest and activity modification to allow inflammation to subside.
• Physical therapy to strengthen surrounding muscles, improve shoulder mechanics, and restore flexibility.
• Anti-inflammatory medications or corticosteroid injections for pain control if associated shoulder conditions are present.

While mild weakness or cosmetic deformity may remain, many patients function well without surgery.

However, surgical repair or tenodesis is recommended for younger, active individuals, laborers, or those with persistent pain or cosmetic concerns.

Biceps tenodesis is the most common surgical option. During this procedure, the torn long head of the biceps tendon is reattached to the humerus just below the shoulder joint, relieving pain and restoring function. The procedure can be done arthroscopically or through a small incision.

Recovery involves a brief period of sling protection, followed by gradual rehabilitation focused on restoring range of motion, then progressive strengthening. Most patients regain near-normal strength and function within 3–4 months.

While not all injuries can be prevented, maintaining healthy shoulder mechanics and tendon strength can reduce risk:

• Avoid repetitive overhead strain and allow adequate rest between workouts.
• Warm up properly before lifting or throwing.
• Strengthen the rotator cuff and shoulder stabilizers to reduce stress on the biceps tendon.
• Use proper lifting form, keeping elbows near the body during heavy loads.
• Avoid smoking and anabolic steroid use, both of which weaken tendons.
• Treat shoulder pain early, as chronic inflammation can weaken the tendon over time.