What are the effects of glenoid impingement in supraspinatus tendonitis?

Updated: Dec 03, 2018
  • Author: Thomas M DeBerardino, MD; Chief Editor: Sherwin SW Ho, MD  more...
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Arthroscopic studies of these patients have noted impingement between the posterior superior edge of the glenoid and the insertion of the rotator cuff tendon with the arm placed in the throwing position, abducted and externally rotated. Lesions are noted along the area of impingement at the posterior aspect of the glenoid labrum and articular surface of the rotator cuff. This concept is believed to occur most commonly in throwing athletes and must be considered when assessing for impingement and rotator cuff tendonitis.

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