56-year-old male with right deltoid pain and mass. Concern for muscle tear. Multiple skin markers are identified presumably representing the patient's palpable area of concern. Multiple sequences are degraded by patient motion artifact. Note is made of a 5.6 x 3.4 x 1.4 cm (CC x AP x TR) mass along the lateral aspect of the distal fibers of the deltoid muscle which demonstrates fat signal intensity on all sequences. There is no pathologic enhancement on postcontrast sequences. No additional focal mass lesions are identified. The deltoid muscle appears intact, as clinically questioned. The imaged musculature of the right arm is normal in appearance. No bone marrow signal abnormality is identified. There is a trace amount of fluid within the subacromial subdeltoid bursa. The rotator cuff musculature is incompletely evaluated by this examination. Mild degenerative changes affect the acromioclavicular joint. There is a small amount of fluid within the glenohumeral joint without evidence of a large effusion. No evidence of lymphadenopathy.
5.6 cm mass along the lateral aspect of the distal fibers of the deltoid muscle with imaging characteristics most consistent with a lipoma.