Skeletal Radiology

, Volume 25, Issue 8, pp 743–748 | Cite as

Humeral avulsion of the anterior shoulder stabilizing structures after anterior shoulder dislocation: demonstration by MRI and MR arthrography

  • P. F. J. Tirman
  • Lynne S. Steinbach
  • John F. Feller
  • Anthony E. Stauffer
ARTICLE

Abstract

Objective. To demonstrate the MRI findings of an anterior shoulder capsular avulsion from the humerus, with or without subscapularis rupture, after anterior dislocation or severe abduction external rotation injury. Design and patients. We retrospectively reviewed the MRI and MR arthrographic examinations of seven patients who were identified at surgery with avulsion of the anterior shoulder stabilizers from the humerus. MRI was correlated with clinical history and surgical results. Results. MRI findings included: inhomogeneity or frank disruption of the anterior capsule at the humeral insertion (all), fluid intensity anterior to the shoulder (six patients), tear of the subscapularis tendon (six patients), dislocation of the biceps tendon (four patients), and a Hill-Sachs deformity (four patients). MR arthrography additionally found extravasation of contrast through the capsular defect (two patients). Conclusions. Our findings suggest that MRI is helpful for diagnosing humeral avulsion of the anterior glenohumeral capsule, especially when a tear of the subscapularis tendon insertion is present. MR arthrography may be of benefit for diagnosing capsular avulsion without associated subscapularis tendon abnormality.

Key words Humeral avulsion Shoulder dislocation MRI MR arthrograhpy 

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Copyright information

© International Skeletal Society 1996

Authors and Affiliations

  • P. F. J. Tirman
    • 1
  • Lynne S. Steinbach
    • 2
  • John F. Feller
    • 3
  • Anthony E. Stauffer
    • 4
  1. 1.San Francisco Magnetic Resonance Center, 3333 California St., STE 105, San Francisco, CA 94118, USAUS
  2. 2.Department of Radiology, University of California at San Francisco, San Francisco, California, USAUS
  3. 3.Department of Veterans Affairs, David Grant USAF Medical Center, Travis Air Force Base, California, USAUS
  4. 4.Radiologic Imaging Associates, Mission Viejo, California, USAUS

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