43-year-old male, evaluate for AC joint arthritis. ROTATOR CUFF: There may be minimal tendinosis of the posterior fibers of the supraspinatus tendon, but the supraspinatus tendon and muscle otherwise are within normal limits. There is mild increased signal intensity and thickening of the anterior fibers of the infraspinatus tendon indicating mild tendinosis, with cyst formation in the underlying humeral head. The remaining infraspinatus tendon and muscle are within normal limits. The teres minor and subscapularis tendons and muscles appear normal.SUPRASPINATUS OUTLET: Small foci of metallic artifact within the soft tissues about the acromioclavicular joint likely reflect prior surgery. The AC joint is slightly widened and contains a small amount of fluid, which may be due to prior surgery. There are small cysts in the anterior distal clavicle as well as mild edema within the distal clavicle that we suspect is degenerative in etiology. Alignment is within normal limits. The signal intensity of the acromion process appears normal. There is no frank fluid in the subacromial-subdeltoid bursa.GLENOHUMERAL JOINT AND GLENOID LABRUM: Glenohumeral alignment is within normal limits. Given the limitations of a non-arthrogram examination the glenoid labrum appears intact.BICEPS TENDON: Given the limitations of a non-arthrogram examination the biceps tendon appears normal.
1. Presumed postoperative changes of the AC joint as described above. In addition, there is edema and cyst formation in the distal clavicle which may be degenerative in etiology.2. Mild rotator cuff tendinosis.