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"Fracture or no Fracture ? "
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Case of the Week 255 
What's the most likely diagnosis?
- 26 year-old with pain in wrist following fall
- Fracture of hook of the hamate
- Perilunate dislocation
- Colles' fracture
- Boxer's fracture
- Lunate dislocation
Answer:
5. Lunate dislocation
More (Click Discussion Tab)
Lunate Dislocation
General Considerations
- Mechanism of injury is usually fall onto an outstretched hand with wrist in ulnar deviation and dorsiflexion
- Wrist dislocations are uncommon but lunate is the most common bone in the wrist to dislocate
- Most severe of carpal instabilities
- Involves all the intercarpal joints and disruption of most of the major carpal ligaments
- Capitate and all other carpal bones will lie posterior to lunate on lateral radiograph
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