Presentation
Fall onto outstretched right arm while ice skating. Upon presentation a tenderness over the dorsal aspect of the wrist was found without swelling.
Patient Data
A small bone fragment is visible on the lateral view dorsal to the carpal bones, raising the possibility of triquetral fracture, however no cortical irragularity can be observed.
CT demonstrated a minimally displaced avulsion injury of the dorsal cortex of the triquetrum. Incidentally a bone island can be observed in the capitate.
Case Discussion
The triquetrum is the second most commonly injured carpal bone after the scaphoid, and physical symptoms are also similar. Since x-ray imaging abnormalities are mostly subtle, careful scrutiny of the dorsal aspect of the carpal bones is required in case of suspected injury.
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