Pectoralis Major Rupture

What is the Pectoralis Major?

The pectoralis major is a large muscle in the chest. It is used when you pull your shoulder across your chest. The pectoralis major originates from the clavicle (collar bone) as well as the sternum (breastbone) and is attached near the top of the upper arm bone (humerus).

How is the Pectoralis Major injured?

The pectoralis major may be injured while weightlifting, bench pressing or other activities where the arm is forced into external rotation while being contracted. This may cause a partial or complete tear of the pectoralis major within the tendon, muscle or at their junction.

Symptoms of Pectoralis Major Rupture

You may hear a pop in your chest or shoulder which may be accompanied by pain and bruising in the front of your shoulder and arm weakness.

Treatment of Pectoralis Major Injuries

Partial tears of the pectoralis major may be treated conservatively with rest, a sling, ice application, compression and medications. Physical therapy may be recommended 2 weeks after the injury. Tears at the junction of the muscle and tendon respond better to conservative treatment. Pectoralis major repair surgery is performed for severe or complete tears of the pectoralis major.