Monteggia type I equivalent lesion: diaphyseal ulna and radius fractures with a posterior elbow dislocation in an adult.

BACKGROUND: A rare type I Monteggia equivalent lesion with a posterior dislocation associated with a diaphyseal radius and ulna fracture in an adult is described. The probable mechanisms of injury are speculated to include flexion of the elbow and pronation of the forearm. METHODS AND
RESULTS: Early reduction of the dislocation and rigid fixation of the fractures helped to achieve excellent results.