A shoulder ultrasound shows the soft tissue structures surrounding the shoulder joint, including the four rotator cuff tendons (supraspinatus, infraspinatus, subscapularis, and teres minor), the long head of the biceps tendon, the subacromial-subdeltoid bursa, the acromioclavicular joint, and the glenohumeral joint. It can identify tears, tendinopathy, bursitis, calcific deposits, impingement, and inflammation.