- 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.