CHORUS
Collaborative Hypertext of Radiology
Musculoskeletal system
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shoulder dislocation
- anterior (subcoracoid)
- humerus --> beneath coracoid process, anterior to glenoid
- most frequent site + type of dislocation of any joint
- easily detected
- repeated dislocation ==> Hill-Sachs deformity
and/or Bankart deformity
- posterior
- 2 - 4% of shoulder dislocations
- 50% d/t seizures; trauma, electrical shock
- often missed on AP view: use "Y" or axillary view
- "rim" sign in acute dislocation
- increased glenohumeral space
(normal 6 mm --> widened to 14 mm)
- +/- compression fx of anterior surface of humeral head
- 20% ==> associated fx
Charles E. Kahn, Jr., MD - 2 February 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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