Transstyloid dorsal luxation of the lunate. Case report.

A case of total dorsal luxation of the lunate, combined with an avulsion of the radial styloid is recorded. Radiographs did not reveal any other signs of carpal collapse. We suggest that a concurrent hyperflexion, ulnar deviation and pronation of the wrist joint may reasonably be regarded as the etiology of this lesion, which was treated by delayed, open reduction and partial intracarpal arthrodesis. Similar cases have not been reported.