47-year-old male with left shoulder injury. Concern for rotator cuff tear versus strain. Unable to abduct left arm. ROTATOR CUFF: There is a full-thickness complete or near complete tear of the infraspinatus tendon with approximately 3 cm of retraction. There is edema within the infraspinatus muscle suggesting that this may represent an acute injury. There is thickening and increased signal intensity indicating moderate to severe tendinosis of the supraspinatus tendon. There is also a linear focus of fluid signal intensity within the insertional fibers of the tendon indicating a partial thickness tear which appears to be concealed and measures approximately 6 to 7 mm. The supraspinatus muscle appears intact. There is thickening and increased signal intensity within the subscapularis tendon likely representing a combination of tendinosis and redundancy due to internal rotation of the humeral head. Additionally, there is a small 6 to 7 mm focus of linear signal abnormality within the insertional fibers of the subscapularis tendon indicating a small insertional tear. The more superficial fibers extending to the greater tuberosity are indistinct which may represent additional tearing. The subscapularis muscle appears intact.SUPRASPINATUS OUTLET: Mild osteoarthritis affects the acromioclavicular joint. There is a small amount of fluid within the subacromial/subdeltoid bursa.GLENOHUMERAL JOINT AND GLENOID LABRUM: Mild osteoarthritis affects the glenohumeral joint. BICEPS TENDON: There is thickening and increased signal intensity within the tendon of the long head of the biceps within the rotator interval indicating moderate tendinosis.ADDITIONAL
1. Full-thickness near complete or complete tear of the infraspinatus with retraction and additional rotator cuff abnormalities as described above.2. Osteoarthritis of the acromioclavicular and glenohumeral joints.3. Tearing of the superior glenoid labrum.4. Biceps tendinosis.