Carpometacarpal dislocation of the thumb associated with ipsilateral fracture of the distal radius.

An acute carpometacarpal (CMC) dislocation of the thumb is itself an extremely rare injury, but one associated with a fracture of the distal radius has never before been reported. In our case, the fracture of the distal radius was treated by closed reduction and immobilization with a plaster cast, whereas the dislocation of the CMC of the thumb was treated with closed reduction, percutaneous fixation with Kirschner wires, and immobilization with a plaster cast. At the patient's two-year follow-up examination, the distal radius fracture displayed successful functional and radiographic results, but a subluxation of the CMC joint was evident.