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January 2004
By Theodore E . Keats, MD
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A 60-year-old man complains of pain in his shoulder
that has persisted for three months. There is no history
of trauma. What is your impression of this frontal film
of his shoulder?
CLICK HERE FOR ANSWER
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ANSWER
The correct diagnosis is malignancy. The spotted lucency
of the bone and the presence of a pathologic fracture
point to a malignant bone lesion. It would be impossible
to determine whether this is a primary lesion or a metastatic
deposit based on this film alone. Biopsy proved it to
be a chondrosarcoma.
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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 36(1):59, 2004
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