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IMAGE QUIZ ARCHIVE

Image Quiz
A Painful Mass on the Anterior Surface of the Tibia1
A thirty-five-year-old man had a five-month history of a small, painful mass on the anterior surface of the left tibia. The nodule, 1-cm in diameter, was covered by intact skin and had shown slow, progressive growth.
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Fig. 1-A

Fig. 1-B

Fig. 1-C

What is the diagnosis?

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Copyright © 2004 by the The Journal of Bone and Joint Surgery, Inc.