Pediatric posterior monteggia lesion: a greenstick fracture of the proximal ulnar metaphysis with radial neck fracture. A case report.

We report a case of posterior Monteggia lesion in a 12-year-old girl consisting of a greenstick fracture of the proximal ulnar metaphysis and a radial neck fracture with a proximal and posterior 90-degree rotational displacement of the radial head. Closed reduction of the radial head resulted in complete reversal of the radial head, which was corrected by open reduction and internal fixation. Cast immobilization without correction of the plastic deformation of the proximal ulna caused posterior bowing of the ulna and posterior displacement of the fractured radial neck. Corrective osteotomy of the ulna and third operation of radius resulted in bony union and acceptable alignment.