Glenohumeral joint instability

Authors

  • Patrick Omoumi MD,

    1. Department of Radiology, Cliniques Universitaires Saint Luc, Académie Universitaire de Louvain, Brussels, Belgium
    2. Department of Radiology, University of California, San Diego, California, USA
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  • Pedro Teixeira MD,

    1. Department of Radiology, University of California, San Diego, California, USA
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  • Frédéric Lecouvet MD, PhD,

    1. Department of Radiology, Cliniques Universitaires Saint Luc, Académie Universitaire de Louvain, Brussels, Belgium
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  • Christine B. Chung MD

    Corresponding author
    1. Department of Radiology, University of California, San Diego, California, USA
    2. Department of Radiology, VA Healthcare System, San Diego, California, USA
    • 408 Dickinson St., San Diego, CA 92103
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Abstract

Due to the configuration of its bony elements, the glenohumeral joint is the most mobile joint of the body, but also an inherently unstable articulation. Stabilization of the joint is linked to a complex balance between static and dynamic soft tissue stabilizers. Because of complex biomechanics, and the existence of numerous classifications and acronyms to describe shoulder instability lesions, this remains a daunting topic for most radiologists. In this article we provide a brief review of the anatomy of the glenohumeral joint, as well as the classifications and the pathogenesis of shoulder instability. Technical aspects related to the available imaging techniques (including computed tomography [CT] arthrography, magnetic resonance imaging [MRI], and MR arthrography) are reviewed. We then describe the imaging findings related to shoulder instability, focusing on those elements that are important to the clinician. J. Magn. Reson. Imaging 2011;33:2–16. © 2010 Wiley-Liss, Inc.

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