Question: what causes fluid in the subacromial subdeltoid bursa
Answer: Subacromial bursitis is a condition caused by inflammation of the bursa that separates the superior surface of the supraspinatus tendon ( one of the four tendons of the rotator cuff ) from the overlying coraco - acromial ligament , acromion , coracoid ( the acromial arch ) and from the deep surface of the deltoid muscle .