Pectoralis Tendon Tears

The pectoralis major muscle originates from two primary locations:

1. Clavicular Head: Originates from the clavicle (collarbone) and contributes to shoulder flexion and internal rotation.
2. Sternal Head: Originates from the sternum (breastbone) and ribs, playing a role in adduction and internal rotation of the arm.

These two heads converge to form a single tendon, which inserts into the humerus This tendon is responsible for transmitting force from the muscle to the bone, enabling movement of the upper arm.

When the pectoralis major tendon tears, it commonly occurs at one of three locations:

1. Musculotendinous Junction: Where the muscle transitions into the tendon, often the site of partial tears.
2. Tendon Insertion on the Humerus: The most common location for complete ruptures.
3. Muscle Belly: Rarely involved but may sustain damage in severe cases.

The extent of the injury can vary:

• Partial Tears: Some fibers remain intact, leading to pain but preserved function.
• Complete Tears: Full separation of the tendon from the bone, resulting in significant weakness and functional impairment.

Individuals with a pectoralis major tendon tear may experience:

• A sudden, sharp pain in the chest or upper arm, often accompanied by an audible “pop.”
• Swelling and bruising in the upper arm and chest region.
• Visible deformity, including a retracted muscle appearance or an asymmetrical chest contour.
• Weakness in shoulder movements, especially pushing or lifting activities.
• Decreased range of motion and difficulty performing everyday tasks such as pushing a door or lifting objects.

For partial tears or cases where surgery is not an option, conservative management may include:

• Rest and Activity Modification: Avoiding activities that exacerbate pain or strain the injured tendon.
• Physical Therapy: Strengthening the surrounding muscles to compensate for the weakness and restore function.
• Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): To reduce pain and inflammation.
• Ice Therapy: Applying ice packs to minimize swelling in the acute phase.
• Bracing or Sling Use: Immobilization may be recommended in the early stages for comfort but can lead to stiffness with prolonged use

While nonsurgical treatment can help with pain management and partial functional recovery, complete tears generally do not heal on their own and may result in permanent strength deficits.

Surgical intervention is often recommended for complete tears, particularly in active individuals or those who rely on upper-body strength for work or sports. The procedure typically involves:

1. Incision and Tendon Preparation: A small incision is made near the shoulder to access the torn tendon.
2. Tendon Reattachment: The tendon is reattached to the humerus using sutures and bone anchors.
3. Rehabilitation Protocol: Postoperative physical therapy is essential to restore range of motion and strength.