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American Journal of Roentgenology, Vol 130, Issue 5, 951-954
Copyright © 1978 by American Roentgen Ray Society

Articles

The trough line: a radiographic sign of posterior shoulder dislocation

SJ Cisternino, LF Rogers, BC Stufflebam, and GD Kruglik

Over 50% of posterior dislocations of the shoulder are not recognized initially because of failure to appreciate the subtle clues available on the standard frontal projection. In 15 of 20 cases of posterior dislocation, two parallel lines of cortical bone were identified on the medial aspect of the humeral head. One line represents the medial cortex of the humeral head. The other was found to represent the margin of a troughlike impaction fracture. This is designated the "trough line". This line proved to be an important clue in the recognition of posterior dislocations of the shoulder.
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This article has been cited by other articles:


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C. M. Robinson and J. Aderinto
Posterior Shoulder Dislocations and Fracture-Dislocations
J. Bone Joint Surg. Am., March 1, 2005; 87(3): 639 - 650.
[Abstract] [Full Text] [PDF]

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D. M. Gor
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