Chauffeur (Backfire)

The chauffeur fracture is also called a lorrie or Hutchinson fracture. This fracture results from a direct injury to the thenar side of the wrist, resulting in intraarticular fracture at the base of the radial styloid. This type of fracture resulted from a backfire when a crank was used to start a motor in automobiles.
A PA radiograph of the wrist. There is an intraarticular fracture of the radial styloid.

B Lateral radiograph of the wrist. This shows the radial styloid fracture.

C PA radiograph of the wrist with scaphoid deviation. This also demonstrates the intraarticular involvement of this fracture.

Links to online textbooks

Wheeless' Orthopedics: discussion of the chauffeur fracture

References:

Hutchinson F 3rd: Decision making in distal radius fractures J South Orthop Assoc. 1995 Winter;4(4):290-306. [See related articles]
Hutchinson F 3rd: Malunions of the distal radius: treatment options J South Orthop Assoc. 1995 Spring;4(1):53-68. [See related articles]

A	PA radiograph of the wrist. There is an intraarticular fracture of the radial styloid.
B	Lateral radiograph of the wrist. This shows the radial styloid fracture.
C	PA radiograph of the wrist with scaphoid deviation. This also demonstrates the intraarticular involvement of this fracture.