58-year-old male patient with severe dermatomyositis with proximal muscle wasting. Evaluate muscle mass. ROTATOR CUFF: There is mild thickening and increased signal intensity within the distal fibers of the supraspinatus tendon consistent with mild tendinosis, but no full-thickness tear. There is increased signal intensity within the supraspinatus muscle with minimal muscle atrophy. The tendons of the infraspinatus, teres minor, and subscapularis are intact. The muscles of the infraspinatus, teres minor, and subscapularis demonstrate increased signal intensity on T2-weighted images with minimal atrophy, more pronounced in the subscapularis.SUPRASPINATUS OUTLET: Mild osteoarthritis affects the acromioclavicular joint. There is no significant fluid within the subacromial/subdeltoid bursa.GLENOHUMERAL JOINT AND GLENOID LABRUM: Glenohumeral joint alignment is within normal limits. The labrum appears intact. There is a small glenohumeral joint effusion. Degenerative cysts are noted within the posterolateral humeral head.BICEPS TENDON: The long head of the biceps tendon appears intact. ADDITIONAL
1. Diffuse signal abnormality within the visualized musculature of the right shoulder consistent with inflammation and provided history of dermatomyositis.2. Supraspinatus tendinopathy but no full thickness rotator cuff tear.3. Small glenohumeral joint effusion.