Semin Musculoskelet Radiol 2012; 16(04): 286-295
DOI: 10.1055/s-0032-1327003
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

MR Imaging of the Shoulder: First Dislocation versus Chronic Instability

Soterios Gyftopoulos
1  Department of Radiology, New York University Hospital for Joint Diseases, New York, New York
,
Jenny Bencardino
1  Department of Radiology, New York University Hospital for Joint Diseases, New York, New York
,
William E. Palmer
2  Department of Musculoskeletal Radiology, Massachusetts General Hospital, Boston, Massachusetts
› Author Affiliations
Further Information

Publication History

Publication Date:
09 October 2012 (online)

Abstract

Traumatic dislocation of the shoulder is a frequent injury in the young and active population. An acute shoulder dislocation often denotes a onetime traumatic episode, whereas chronic shoulder instability indicates multiple recurrent dislocations. Imaging, in particular MRI, is a useful tool that can accurately demonstrate the typical soft tissue and osseous markers of shoulder dislocation. However, the ability to differentiate between first time versus recurrent dislocation based on imaging remains in question. In this article, we describe the underlying biomechanics of glenohumeral stability as well as the imaging features and treatment options of shoulder dislocation. A review of current literature is presented, aimed to shed light about the potential role of imaging in distinguishing first dislocation versus chronic instability.