Hi, this is Sagar Wagle, one of the musculoskeletal radiology fellows at Stanford University. We have a 19 year old male who felt a pop and a tearing sensation in left shoulder while playing football game. This is the patient. On the right side, we see the normal pectoralis muscle bulge. On the left side, which is the affected side, we do not see the normal pectoralis muscle bulge. This is the anatomy of the pectoralis major muscle and it attaches to the proximal humerus. On the ultrasound image on the right, H indicates the humerus. This is the pectoralis major muscle. This fluid filled gap shows the site of tear and this shows the retracted tendon. The patient was treated surgically and the torn pectoralis major tendon was tacked down in the proximal humerus using these suture anchors. We have a 33 year old male who heard a pop during bench press. As we come anteriorly in this MRI, this area of increased signal intensity indicates the site of pectoralis muscle tear. Let's look at it one more time. This is pectoralis major muscle coming into view and this indicates the site of tear. In this MRI, we're going posteriorly. This is the pectoralis major muscle. This linear increased signal intensity, this indicates muscle strain and this area of maximum increased signal intensity indicates the site of muscle tear near the myotendinous junction. Thank you for watching the video.

3rd Edition, CASE 09

3rd Edition

Chest

pectoral muscle injury

Sagar Wagle

musculoskeletal radiology

tendon tear

MRI imaging