Modality: X-ray (Frontal)

- “ Typical appearances of a posterior shoulder dislocation, demonstrating the relatively subtle AP findings.  ”

Used in the following article:

  • Posterior shoulder dislocation - “ Posterior shoulder dislocations are far less common than anterior shoulder dislocations and can be difficult to identify if only AP projections ar...”
  • Lightbulb sign (shoulder dislocation) - “ The lightbulb sign refers to the abnormal AP radiograph appearance of the humeral head in posterior shoulder dislocation. When the humerus disloc...”
  • Loss of normal half-moon overlap sign (shoulder) - “ Loss of half-moon overlap sign, which does not really roll off the tongue, is a sign of posterior shoulder dislocation on AP radiographs.  On a n...”

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