Partial subscapularis tendon tear

The long head of the biceps appears thickened with increased echogenicity. It shows surrounding anechoic fluid and thickened synovial sheath. The subscapularis tendon is thickened with a disturbed fibrillary pattern. It shows a well-defined defect partially interrupting its fibersfibres and containing anechoic fluid suggesting a partial tear. Dynamic examination of the subscapularis tendon in external and internal rotation revealed a limitation of motion below the coracoid suggesting impingement. There is an irregularity of both the greater and lesser tuberosities suggesting enthesopathy at the site of insertion of both supraspinatus and subscapularis. The supraspinatus tendon below the acromion is thickened with no interruption of its fibersfibres. Dynamic examination of the supraspinatus tendon while performing abduction from 15 to 90 degrees revealed mild limitation of motion with delayed passage of muscle fibersfibres below the acromion. These findings suggest chronic tendinopathy of the supraspinatus. Note the osteoarthritic changes of the acromioclavicular joint.