Which of the following is true of the shoulder impingement syndrome?
A. It involves an expansion of the long head of the biceps tendon under the coracoacromial arch.
B. It commonly involves the head of the humerus being forced out of its joint capsule in an anterior direction.
C. It causes tenderness to palpation in the area just under the acromion.
D. It involves a mechanical compression of the supraspinatus tendon and the subacromial bursa.
Answer: D
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