54-year-old male with right shoulder pain not improving despite injection. ROTATOR CUFF: There is fluid signal abnormality along the posterior aspect of the humeral head which may reflect a ganglion within the infraspinatus muscle or less likely a small interstitial tear. The supraspinatus and infraspinatus muscles and tendons otherwise appear intact. There is thickening and intermediate signal abnormality within the supraspinatus tendon consistent with mild tendinosis. There is mild fatty atrophy of the infraspinatus along the myotendinous junction. The teres minor and subscapularis muscles and tendons appear intact.SUPRASPINATUS OUTLET: No fluid within the subacromial subdeltoid bursa. There is extensive increased bone marrow signal abnormality about the acromioclavicular joint and subcutaneous edema. There is subchondral cyst and osteophyte formation about the distal clavicle.GLENOHUMERAL JOINT AND GLENOID LABRUM: Mild to moderate degenerative changes affect the glenohumeral joint. There is heterogeneity and increased signal abnormality within the superior labrum suggestive of degenerative tearing.BICEPS TENDON: No significant abnormality noted. ADDITIONAL
1. Extensive bone marrow edema and subcutaneous inflammatory change about the AC joint, which may be degenerative in etiology. Further evaluation with dedicated radiographs is recommended.2. Rotator cuff tendinosis without evidence of a full-thickness rotator cuff tear. Other findings as described above.