88-year-old female with shoulder pain, limited motion. ROTATOR CUFF: There is thickening of the supraspinatus tendon with intermediate signal intensity near its insertion at the greater tuberosity indicating tendinosis. There is mild fatty infiltration of the supraspinatus muscle. There is moderate fatty atrophy of the infraspinatus muscle; the infraspinous tendon appears intact and normal. The subscapularis and teres minor tendons and muscles are morphologically normal.SUPRASPINATUS OUTLET: Severe degenerative changes affect the acromioclavicular joint with osteophyte formation and spur formation along the undersurface of the acromion.GLENOHUMERAL JOINT AND GLENOID LABRUM: Moderate osteoarthritic changes affect the glenohumeral joint with joint space narrowing, osteophyte formation and subchondral cysts. There is a small effusion within the glenohumeral joint. The glenoid labrum appears morphologically normal on this nonarthrogram study. There is a paralabral cyst abutting the spinoglenoid notch and is most likely the cause of the moderate fatty atrophy of the infraspinatus muscle due to mass effect on the suprascapular nerve.BICEPS TENDON: The long head of the biceps tendon appears normal and intact throughout its course with small amount of fluid in the tendon sheath communicating with the fluid in the glenohumeral joint.ADDITIONAL
1. Tendinosis of supraspinatus tendon. No full-thickness rotator cuff tear.2. There is moderate fatty atrophy of the infraspinatus muscle most likely caused by a paralabral cyst abutting the spinoglenoid notch due to mass effect on the suprascapular nerve.3. Moderate to severe degenerative changes of the acromioclavicular and glenohumeral joints as described above. There is a small effusion within the glenohumeral joint.