A Case of Epiphyseal Separation of Distal Radius Due to Interposition of Extensor Digitorum Communis

We reported a case with epiphyseal separation of the distal radius which could not be reduced by nonsurgical manipulation due to interposition of the extensor digitorum communis tendon. The case was a 12-year-old boy who was injured by falling down from a running bicycle. X-ray findings showed markedly separated distal epiphysis of the right radius with fracture of the distal ulna. In spite of manipulation under anesthesia, the epiphyseal separation was irreducible. Operative findings showed that the extensor digitorum communis tendon was interposed between the separated radial fragments. Radius was fixed by Kirschner wires following surgical reduction.