An irreducible Salter-Harris type IV distal ulna fracture.

Epiphyseal fractures of the distal radius are common in children but those involving the distal ulna are rare. Distal ulna epiphyseal injuries are usually Salter-Harris type II and are usually reduced closed and held in plaster to produce good results. In this paper we describe a Salter-Harris type IV injury of the distal ulna epiphysis which required open reduction and internal fixation due to soft tissue interposition.