Radial Styloid Fracture

A force directed along the radial side of the hand can produce a transverse or oblique fracture that runs from the scaphoid fossa to the metaphysis of the radius. It is best seen on the anteroposterior radiograph as a thin, lucent line beneath the radial styloid. Because the major carpal ligaments along the radial side of the wrist insert on the radial styloid, displacement of this fracture can produce carpal instability. Displaced fractures often require open reduction and internal fixation. Displacement of as little as 3 mm is often associated with accompanying scapholunate dissociation. Failure to recognize these intercarpal ligament tears adds to the potential for subsequent posttraumatic arthritis.

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