Britt van der Kolk on Twitter: "Visual Dx: posterior shoulder dislocation - lightbulb sign @Radiopaedia #FOAMed #FOAMrad https://t.co/X04rk597qz https://t.co/UqBFy7m6NZ" / Twitter
USMLE AID on Twitter: "Posterior dislocation of shoulder on XRay -Light bulb sign -Trough line sign -Rim sign http://t.co/YBR3AWL7rB #USMLE http://t.co/BOVvhHYpPx" / Twitter
The 'Lightbulb Sign' doesn't always mean a posterior dislocation
Missed posterior shoulder fracture dislocations: a new protocol from a London major trauma centre | BMJ Open Quality
Emergency Medicine News
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File:Lightbulb sign - posterior shoulder dislocation - Roe vor und nach Reposition 001.jpg - Wikimedia Commons
Posterior shoulder dislocation | Radiology Case | Radiopaedia.org