77-year-old female patient with weakness and pain in left shoulder, limited abduction. ROTATOR CUFF: There is thickening and intermediate signal intensity of the supraspinatus tendon indicating moderate to severe tendinosis with probable articular and bursal surface fraying. We see no full-thickness fluid filled supraspinatus tear. The supraspinatus muscle appears normal. There is moderate to severe tendinosis of the infraspinatus tendon with fluid signal intensity along the myotendinous junction suggesting interstitial tearing with possible extension to the bursal surface fibers. We see no full-thickness fluid-filled tear of the infraspinatus tendon. The infraspinatus muscle appears normal. The teres minor muscle and tendon appear normal. There is thickening and increased signal intensity of the distal fibers of the subscapularis tendon which likely represent a combination of tendinosis and redundancy due to the humerus held in internal rotation. Also a focus of linear increased signal intensity along the insertion of the subscapularis tendon likely represents a bursal surface tear, but we see no full-thickness tearing. The subscapularis muscle is normal.SUPRASPINATUS OUTLET: Moderate to severe osteoarthritis affects the acromioclavicular joint which results in mild impression of the superior fibers of the supraspinatus. A small amount of fluid is noted in the subacromial/subdeltoid bursa.GLENOHUMERAL JOINT AND GLENOID LABRUM: Moderate osteoarthritis affects the glenohumeral joint. There is a small joint effusion with fluid extending into the subscapular recess with foci of intermediate signal intensity which presumably represents synovitis or debris.BICEPS TENDON: Increased signal intensity within the biceps tendon within the rotator interval suggests tendinosis. Fluid within the biceps tendon sheath may represent extension of fluid from the glenohumeral joint rather than tenosynovitis.
1. Rotator cuff tendinosis with partial thickness tearing/fraying as described above, but we see no discrete full-thickness fluid-filled rotator cuff tear.2. Osteoarthritis of the glenohumeral and acromioclavicular joints and other findings as described above.