What Does Significant Glenohumeral Joint Effusion Mean?

There is increased signal involving the anterior fibers of the distal supraspinatus tendon, compatible with tendinosis and possible low-grade partial tearing. The subscapularis, infraspinatus and teres minor tendons appear intact. The muscles of the rotator cuff do not demonstrate atrophy or fatty infiltration. The intra and extra-articular portions of the biceps tendon are unremarkable. The acromioclavicular joint is within normal limits. There is a type 1 acromion as seen in the sagittal plane. The glenoid labrum is not optimally assessed, but no detached tears are seen. Cystic changes are noted at the greater tuberosity. There is no significant glenohumeral joint effusion. Mild subacromial/subdeltoid bursal fluid is noted.