Pectoralis major tear
Shearing pain in left pectoralis during a bench press, significant swelling, defect in pectoral size compared to the right.
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- there is extensive intramuscular oedema involving the sternal and clavicular heads of the pectoralis major muscle. Intramuscular haematoma is seen in the mid-portion of the muscle.
- myofascial fluid and intermuscular fluid is seen anterior to the pectoralis minor muscle and biceps muscle belly.
- there is minor subcutaneous oedema/bruising seen over the anterior chest wall and anteromedial aspect of the proximal upper limb.
- there is a tear of the muscle-tendon junction.This tear involves the central portion of the tendinous insertion with intact fibres of the lateral most aspect of the clavicular head and inferior most aspect of the sternal/abdominal head. Within the central aspect of the lateral pectoralis muscle, the fibres are retracted by up to 3 cm.
- there is no evidence of intra tendinous tear of the pectoralis tendon and no oedema is seen extending to the humerus to indicate a tendon-bone junction injury. The long head biceps tendon is normally positioned.
- neurovascular structures appear intact.
A tear of the pectoralis major is a considerably uncommon injury, often occurring during forceful activity such as bench press. Early diagnosis via MRI and surgical repair is important to ensure a sound recovery.
- 1. Kadu VV, Saindane KA, Godghate N, Godghate N. Pectoralis Major Tear: An Unusual and Rare Presentation. Journal of orthopaedic case reports. 6 (4): 17-19. doi:10.13107/jocr.2250-0685.550 - Pubmed
- 2. Roller A, Becker U, Bauer G. [Rupture of the pectoralis major muscle: classification of injuries and results of operative treatment]. Zeitschrift fur Orthopadie und ihre Grenzgebiete. 144 (3): 316-21. doi:10.1055/s-2006-933444 - Pubmed