Irreducible displacement of the distal radial epiphysis complicating a fracture of the lower radius and ulna.

Open reduction of complete displacement of the distal radial epiphysis in an 11-year-old boy is reported. Difficulty was encountered in dealing with an associated radial diaphyseal fracture at a higher level, an open fracture of the distal ulna and an ulnar nerve injury. The rarity of this combination is discussed.