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May 2005
By Theodore E. Keats, MD
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A 22-year-old man fell on his outstretched hand. This
frontal film of his wrist was made with a splint in
place. What is your interpretation of the image?
CLICK HERE FOR ANSWER
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ANSWER
The correct diagnosis is rotary dislocation of the
navicular, as evidenced by the wide interval between
the navicular and the lunate and the end-on, foreshortened
appearance of the navicular. This injury is a product
of scapholunate instability and may lead to degenerative
arthritis if uncorrected.
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This series of diagnostic quizzes that
challenge your ability to read a variety of x-ray films is
edited by Dr. Keats, alumni professor of radiology at the
University of Virginia School of Medicine in Charlottesville.
Emerg Med 37(5):54, 2005
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