injuries poisoning
Rotator Cuff Injury Subacromial Bursitis
Key Points
The rotator cuff consists of the supraspinatus, infraspinatus, teres minor, and subscapularis muscles; these muscles help stabilize the humeral head during overhead arm motions (eg, pitching, swimming, weightlifting, serving in racket sports) and assist in elevation and rotation of the shoulder. Rotator cuff muscles may be torn acutely; shoulder instability, rotator cuff weakness, or mechanical impingement in the subacromial space may cause tendinitis (particularly of the supraspinatus tendon) and result in subacromial bursitis. Diagnosis is usually made by examination, but some patients require MRI and/or arthroscopy. Treat with NSAIDs, rest, and rotator cuff exercises; corticosteroid injection into the subacromial space is also an option. Surgical repair may be recommended if injury is severe (eg, a complete tear). 