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Case of the Week 615


What is the most likely diagnosis?

  • 37 year-old male after fall on outstretched hand



Frontal Radiograph of the Wrist

  1. Lunate Dislocation
  2. Scapholunate Dissociation
  3. Perilunate Dislocation
  4. Scaphoid Fracture
  5. Rheumatoid Arthritis

Additional Images - None

 

Additional Images

 

 

None


Answer:

2. 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

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This Week

37 year-old male after fall on outstretched hand
 
 



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is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology.