[Inveterated simultaneous dislocation of the proximal and distal radioulnar joints without an associated fracture].

The authors present an unusual case of the inveterated simultaneous dislocation of the proximal and distal radioulnar joints without an associated fracture in a 55-years-old man. Both dislocations persisted 4 months after injury and primary unsuccessful open reduction of the radial head. The left forearm was fixed in rigid full supination of 90 degrees and no rotational movements of the forearm were possible. Darrach's procedure and radial head resection resulted in 135 degrees of the forearm rotation (from 0 degrees to 90 degrees of supination, from 0 degrees to 45 degrees of pronation) without restriction of the flexion and extension of the elbow and wrist. No significant instability of the elbow and wrist, no valgus deformity of the elbow and no reduction of all daily activities of the patient were present at 6 years follow-up.