What is the most likely diagnosis?
- 37 year-old male after fall on outstretched hand
Frontal Radiograph of the Wrist
- Lunate Dislocation
- Scapholunate Dissociation
- Perilunate Dislocation
- Scaphoid Fracture
- Rheumatoid Arthritis
Additional Images - None
Additional Images
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Answer:
3. Scapholunate Dissociation
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Scapholunate Dissociation
General Considerations
- Loss of mechanical linkage between scaphoid and lunate
- Usually relates to complete disruption of the scapholunate interosseous ligament (SLIL)
- Rupture of SLIL most frequently results from fall onto an outstretched hand
- Often associated with additional injuries
- Displaced scaphoid fractures
- Distal radial fractures
- Scapholunate dissociation (SLD) represents first stage in spectrum of perilunate dislocations