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Os Centrale Carpi Simulating a Scaphoid Waist FractureFrom the Department of Diagnostic Radiology, University of Lund, Sweden, Beijing Ji Shui Tan Hospital, Beijing, China, and the Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, Missouri, USA Correspondence: Louis A. Gilula, MD, Professor of Radiology, Director of Musculoskeletal Section, Mallinckrodt Institute of Radiology, 510 South Kingshighway Boulevard, St. Louis, Missouri 63110, USA. The os centrale carpi is a relatively rare accessory carpal bone, and its presence may be confused with a scaphoid fracture. A case is presented which simulated an un-united scaphoid fracture on the plain X-ray film. However, CT in the sagittal plane showed two rounded fragments on the dorsum of the scaphoid with smooth, regular cortical margins differing from an acute scaphoid fracture. Their volume combined with the volume of the scaphoid is more than that of a completely normal scaphoid. There is no evidence of degeneration in the two rounded fragments and scaphoid. Because of these features, the diagnosis of soft tissue injury with an incidental finding of an os centrale carpi was suggested.
Journal of Hand Surgery (British and European Volume), Vol. 19, No. 6,
754-756 (1994) |
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