Pectoralis Major Rupture: Surgical Repair
Pectoralis Major Ruptures: Optimal Timing for Surgical Repair, Techniques, and Outcomes
Pectoralis major ruptures are uncommon injuries that typically occur in young, active men 1. These injuries involve a tear of the pectoralis major tendon, most commonly at its insertion on the humerus 2. Although these injuries are relatively rare, they are becoming an increasingly frequent cause of disability 2. While conservative treatment may be an option for some individuals, surgical repair is often recommended, especially for those who wish to regain full strength and function. This article analyzes the optimal timing for surgical repair of pectoralis major ruptures, discusses the different surgical techniques available, and reviews the outcomes of these repairs, including the factors that influence return to activity.
Risk Factors
Several factors can increase the risk of pectoralis major ruptures. These include:
- Age and Sex: Pectoralis major ruptures are most common in men between the ages of 20 and 50 1.
- Anabolic Steroid Use: The use of anabolic steroids or growth hormones can increase muscle mass more quickly than tendon strength, leading to an increased risk of rupture 3.
- Weightlifting: Weightlifting, particularly bench press exercises, is a common cause of pectoralis major ruptures 1.
- Contact Sports: Activities such as football, wrestling, and rugby can also result in these injuries 2.
Classification of Pectoralis Major Ruptures
Pectoralis major ruptures can be classified based on the location of the tear. Common types include:
- Tendon rupture off the humerus bone: This is the most common type of pectoralis major rupture 4.
- Tear at the musculotendinous junction: This involves a tear at the junction where the muscle fibers meet the tendon 4.
- Tear within the muscle belly itself: This type of tear occurs within the muscle tissue itself 4.
- Muscle tearing off the sternum: This is a very rare type of pectoralis major rupture 4.
Tietjen (1980) proposed an anatomical classification of pectoralis major injuries to guide treatment decisions 5. This classification system categorizes injuries based on the extent and location of the damage, ranging from contusions to complete ruptures.
Optimal Timing for Surgical Repair
The optimal timing for surgical repair of pectoralis major ruptures is still debated. While some studies suggest that early surgical intervention leads to better outcomes, others have found no significant difference between early and delayed repair 4.
Early Repair
Early repair, typically within the first 2 to 3 weeks after injury, may minimize scar tissue formation, muscle atrophy, and retraction of the tendon, potentially making the surgery less complex 7. One study reported excellent or good results in 94% of patients who underwent acute repair of pectoralis major ruptures 10. Early repair is often favored for athletes and active individuals as it may allow for a quicker return to pre-injury activity levels. It is important to note that conservative treatment for pectoralis major ruptures often leads to significant deficits in strength and function, particularly in athletes 11.
Delayed Repair
In some cases, delayed repair may be necessary due to various factors, such as the patient’s overall health or the need for further imaging or evaluation. Studies have shown that successful outcomes are still possible with delayed repair, although the surgical technique may be more challenging due to tendon retraction and scarring 4. For chronic ruptures (more than a couple of months old), an allograft (donor tendon tissue) may be required to bridge the gap between the ruptured tendon and the humerus 1.
Ultimately, the decision regarding the timing of surgery should be individualized based on factors such as the type and extent of the rupture, the patient’s age, activity level, and goals, and the surgeon’s expertise 4.
Surgical Techniques
Several surgical techniques are available for repairing pectoralis major ruptures. The choice of technique depends on factors such as the location and extent of the tear, the quality of the tendon tissue, and surgeon preference 6. Common techniques include:
| Surgical Technique | Description | Outcomes | Complications |
|---|---|---|---|
| Transosseous Suture with Bone Trough | A trough is created in the humerus at the insertion site of the pectoralis major tendon. Drill holes are made lateral to the trough, and sutures are passed through the tendon, into the trough, out the drill holes, and tied over a bone bridge. | This technique has been shown to provide good to excellent outcomes in most cases. | Complications can include persistent pain and superficial infection. |
| Suture Anchor Technique | Suture anchors, which are small metal implants preloaded with high-strength sutures, are placed into the humerus at the tendon insertion site. The sutures are then passed through the tendon and tied to secure the tendon to the bone. | This technique has a high success rate and allows for anatomical repair of the tendon. | Complications are rare but can include transient nerve injury and rerupture. |
| Unicortical Button Technique | This technique involves drilling holes in the humerus and inserting buttons preloaded with sutures. The sutures are then passed through the tendon and tied, securing the tendon to the bone. | This technique is less invasive than transosseous suture techniques and can provide good outcomes. | Complications can include biceps tendinitis and axillary nerve paresthesia. |
| Cortical Button Technique | Similar to the unicortical button technique, this method uses buttons with sutures but involves drilling through both sides of the humerus bone for added stability. | This technique provides strong fixation and may be preferred for certain types of ruptures. | Complications are similar to those of the unicortical button technique. |
A meta-analysis of 259 cases found no statistically significant difference in outcomes between different surgical techniques 6. However, the analysis suggested a trend towards better outcomes with suture anchor fixation, potentially due to its ability to achieve anatomical repair of the tendon 6.
Outcomes of Pectoralis Major Repair and Return to Activity
Surgical repair of pectoralis major ruptures generally yields good to excellent outcomes, with most patients experiencing significant improvement in strength, function, and cosmesis 3. Studies have reported that surgically repaired injuries regained up to 97% of the strength of the uninjured arm, compared to 56% in non-operative patients 4. Operative treatment has been shown to lead to superior improvements in functional outcomes, strength, cosmesis, and satisfaction compared to nonoperative management 13.
Most patients can return to their previous level of activity after surgical repair, although the time frame for return varies depending on the individual and the demands of their activity 11. One study found that 94% of military service members were able to return to full pre-operative function after pectoralis major tendon repair 14. Another study reported that athletes returned to full activity after an average of 5.4 months 5. The average time to return to sports after surgical repair has been reported to be 8.5 months 11.
Several factors can influence the rate of return to activity after pectoralis major repair:
- Timing of Repair: While early repair is often preferred, some studies suggest that delayed repair may not significantly affect long-term outcomes 4.
- Surgical Technique: The choice of surgical technique may influence the recovery process and the final outcome 6.
- Rehabilitation: Adherence to a structured rehabilitation program is crucial for maximizing strength, range of motion, and functional recovery after surgery 15. This typically involves a period of immobilization followed by a gradual progression of range-of-motion exercises and strengthening activities.
- Patient Factors: Individual factors such as age, overall health, body mass index (BMI), and the presence of any underlying medical conditions can affect the recovery process 14. Notably, increasing BMI and active psychiatric conditions have been identified as significant predictors of inability to return to function and failure after surgery 14.
- Injury Severity: The extent of the tear and the degree of muscle retraction can influence the complexity of the surgery and the recovery time 4.
- Repetitive or Prolonged Activity: Repetitive or prolonged activity can cause degeneration of the pectoralis major tendon, increasing the risk of injury and potentially affecting recovery after repair 17.
Conclusion
Pectoralis major ruptures are challenging injuries that require careful consideration and management. Surgical repair is often the preferred treatment option, especially for active individuals who desire to regain full strength and function. While the optimal timing for surgery remains a topic of debate, early repair may offer advantages in terms of minimizing scar tissue formation and tendon retraction. However, successful outcomes are possible with delayed repair as well, although the surgical approach may be more complex.
Various surgical techniques are available, each with its own considerations and potential complications. The choice of technique should be individualized based on the specific characteristics of the injury and the surgeon’s expertise. More research is needed to determine the optimal surgical technique for different types of ruptures and patient populations.
With appropriate surgical intervention and a dedicated rehabilitation program, most patients can expect good to excellent outcomes and a successful return to their pre-injury activity levels. Factors such as patient age, BMI, and the presence of psychiatric conditions can influence the recovery process. Adherence to a structured rehabilitation program and appropriate load management are crucial for maximizing outcomes and preventing re-injury.
Future research should focus on conducting high-quality studies to compare early versus delayed repair and different surgical techniques, with a focus on patient-reported outcomes and long-term functional results. This will help to further refine treatment strategies and improve outcomes for individuals with pectoralis major ruptures.
Works cited
1. Causes, diagnosis, and treatment of pectoralis major rupture – OS Clinic, accessed February 17, 2025, https://os.clinic/conditions/shoulder-elbow/pectoralis-major-injury/
2. Torn Pectoral Muscle | Pectoralis Major Injuries – HSS, accessed February 17, 2025, https://www.hss.edu/conditions_pectoralis-major-tendon-injury-overview.asp
3. Pectoralis major rupture – Windsor Upper Limb, accessed February 17, 2025, https://www.windsorupperlimb.com/conditions/shoulder-conditions/pectoralis-major-rupture
4. Pectoralis Major Rupture | ShoulderDoc, accessed February 17, 2025, https://www.shoulderdoc.co.uk/section/898
5. Pectoralis major muscle total rupture in a body builder | 2024, Volume 59, Issue 2, accessed February 17, 2025, https://journalofsportsmedicine.org/full-text/713/eng
6. Surgical Treatment of Pectoralis Major Muscle Ruptures: A Systematic Review and Meta-analysis – PMC, accessed February 17, 2025, https://pmc.ncbi.nlm.nih.gov/articles/PMC6378447/
7. Pectoralis Major Tendon Repair – Arm Docs, accessed February 17, 2025, https://www.armdocs.com/treatment/pectoralis-major-tendon-repair
8. Pectoralis Major Rupture (Pec Tear) – Shoulder – Dr. Groh, accessed February 17, 2025, https://www.drgordongroh.com/orthopaedic-injuries-treatment/shoulder/pectoralis-major-rupture/
9. What to do if you Suffer a Pectoralis Rupture | Torn Pectoral Muscle – Midwest Sports Medicine Institute, accessed February 17, 2025, https://gomidwestsports.com/pectoralis-ruptures/
10. Outcomes Following Suture-Anchor Repair of Pectoralis Major Tears: A Case Series and Review of the Literature – PMC, accessed February 17, 2025, https://pmc.ncbi.nlm.nih.gov/articles/PMC4492126/
11. Rupture of the pectoralis major muscle: Surgical treatment in athletes – PMC, accessed February 17, 2025, https://pmc.ncbi.nlm.nih.gov/articles/PMC2267574/
12. Surgical and nonsurgical treatment of total rupture of the pectoralis major muscle in athletes: update and critical appraisal, accessed February 17, 2025, https://pmc.ncbi.nlm.nih.gov/articles/PMC3781870/
13. Treatment of Pectoralis Major Tendon Tears: A Systematic Review and Meta-analysis of Operative and Nonoperative Treatment – PMC, accessed February 17, 2025, https://pmc.ncbi.nlm.nih.gov/articles/PMC7005984/
14. Return to Function, Complication, and Reoperation Rates Following Primary Pectoralis Major Tendon Repair in Military Service Mem, accessed February 17, 2025, https://www.brianwatermanmd.com/wp-content/uploads/2024/05/Return-to-Function-Complication-and-Reoperation-Rates-Following-Primary-Pectoralis-Major-Tendon-Repair-in-Military-Service-Members.pdf
15. Pectoralis Major Tear Rehab, accessed February 17, 2025, https://e3rehab.com/pectoralis-major-tear-rehab/
16. Pectoralis Major Muscle Rupture – Boston Sports Medicine, accessed February 17, 2025, https://bostonsportsmedicine.com/wp-content/uploads/2024/01/pectoralis_major_muscle_repair_protocol.pdf
17. Pectoralis Major Muscle Injuries – Hughston Clinic, accessed February 17, 2025, https://hughston.com/wellness/pectoralis-major-muscle-injuries/
