MRI
A rim-enhancing lobulated cystic lesion with thin internal septation is noted superior to the acromioclavicular joint. The lesion is indenting the superior surface of the deltoid. The lesion measures 3.4 x 3.2 x 3.1 cm.
Marked acromioclavicular arthritis.
Massive rotator cuff tear involving the supraspinatus and infraspinatus tendons with atrophy of the muscles. There is superior migration of the humeral head with obliteration of acromio-humeral space.