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Chauffeur's fracture is a type of fracture of the forearm, specifically the radial styloid process. The injury is typically caused by compression of the scaphoid bone of the hand against the styloid process of the distal radius. It can be caused by falling onto an outstretched hand (FOOSH). Treatment is often open reduction and internal fixation, which is surgical realignment of the bone fragments and fixation with pins, screws, or plates.
The name originates from early chauffeurs who sustained these injuries when the car back-fired while the chauffeur was hand-cranking to start the car. The back-fire forced the crank backward into the chauffeur's palm and produced the characteristic styloid fracture. It is also known as a backfire fracture (for the same reason) or a Hutchinson fracture.