What are the possible sites of impingement in supraspinatus tendonitis?

Updated: Dec 04, 2017
  • Author: Thomas M DeBerardino, MD; Chief Editor: Sherwin SW Ho, MD  more...
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Other sites of impingement in the supraspinatus outlet space include the coracoacromial ligament, where thickening can occur, and the undersurface of the acromioclavicular joint, where osteophytes can form. Only rarely is the medial coracoid involved. These impingement sites in the supraspinatus outlet are compressed further when the humerus is placed in the forward flexed and internally rotated position, forcing the greater tuberosity of the humerus into the undersurface of the acromion and coracoacromial arch.

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