![Missed posterior shoulder fracture dislocations: a new protocol from a London major trauma centre | BMJ Open Quality Missed posterior shoulder fracture dislocations: a new protocol from a London major trauma centre | BMJ Open Quality](https://bmjopenquality.bmj.com/content/bmjqir/9/1/e000550/F1.large.jpg)
Missed posterior shoulder fracture dislocations: a new protocol from a London major trauma centre | BMJ Open Quality
![File:Lightbulb sign - posterior shoulder dislocation - Roe vor und nach Reposition 001.jpg - Wikimedia Commons File:Lightbulb sign - posterior shoulder dislocation - Roe vor und nach Reposition 001.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/b/be/Lightbulb_sign_-_posterior_shoulder_dislocation_-_Roe_vor_und_nach_Reposition_001.jpg)
File:Lightbulb sign - posterior shoulder dislocation - Roe vor und nach Reposition 001.jpg - Wikimedia Commons
![Radiopaedia.org on Twitter: "Q: Light bulb appearance to humeral head after motor vehicle accident. Diagnosis? ANSWER: https://t.co/ZEQwZhGqRk #FOAMrad #FOAMed https://t.co/wFED0DKsK3" / Twitter Radiopaedia.org on Twitter: "Q: Light bulb appearance to humeral head after motor vehicle accident. Diagnosis? ANSWER: https://t.co/ZEQwZhGqRk #FOAMrad #FOAMed https://t.co/wFED0DKsK3" / Twitter](https://pbs.twimg.com/media/Ey6x91lVUAUaWLa.jpg)
Radiopaedia.org on Twitter: "Q: Light bulb appearance to humeral head after motor vehicle accident. Diagnosis? ANSWER: https://t.co/ZEQwZhGqRk #FOAMrad #FOAMed https://t.co/wFED0DKsK3" / Twitter
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 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](https://pbs.twimg.com/media/Bq8Rw4aCUAIyTEB.png:large)