Reason: R shoulder mass, superficial History: shoulder mass There is a 3.0 x 1.1 cm mass superficial to the posterior aspect of the deltoid and acromion which extends slightly superior to the acromion and is predominantly fat signal intensity compatible with a lipoma. There is no enhancement on postcontrast sequences. There is intermediate signal intensity within the supraspinatus tendon at its insertion on the greater tuberosity likely representing a combination of tendinosis and insertional tearing that involves the majority of the thickness of the tendon and may focally disrupt the bursal surface fibers at their greater tuberosity attachment. This signal abnormality measures less than 1 cm in the AP dimension. There are small cysts within the underlying humeral head. There is linear increased signal intensity which also extends proximally into the supraspinatus tendon likely representing additional tendinosis and perhaps early delamination. There is perhaps mild tendinosis of the anterior fibers of the infraspinatus, but we see no discrete infraspinatus tendon tear. The subscapularis and teres minor muscles and tendons appear intact. Moderate osteoarthritis affects the acromioclavicular joint. There is a small amount of fluid within the subacromial/subdeltoid bursa suggesting a mild bursitis. Mild osteoarthritis affects the glenohumeral joint. The anterior superior labrum is at least partially separated from the glenoid labrum which may represent a SLAP tear or a normal variant. There is no glenohumeral joint effusion or enhancement on postcontrast sequences to suggest a synovitis. The tendon of the long head of the biceps appears intact.
1. Subcutaneous lipoma as described above.2. Osteoarthritis of the glenohumeral and acromioclavicular joints.3. Separation of the anterior superior glenoid labrum from the underlying glenoid may represent a normal variant or a SLAP tear.4. Insertional tendinosis/tearing of the supraspinatus as described above.5. Mild subacromial/subdeltoid bursitis.