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November 2001
By Theodore E. Keats, MD
A 50-year-old man complains of pain of several years' duration
in his knee and has a history of knee injuries. What is your interpretation
of the frontal projection of his knee?
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ANSWER
The correct diagnosis is Pellegrini-Stieda disease. The calcific
density (arrow) is indicative of an old injury of the medial collateral
ligament and represents posttraumatic ossification.
Emerg Med 33(11):73, 2001
This series of diagnostic quizzes that challenge your ability
to read a variety of x-ray films is edited by Dr. Keats, professor
of radiology and professor of orthopedics at the University of Virginia
School of Medicine in Charlottesville.
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