Abstract
We reported a case with epiphyseal separation of the distal ulna which could not be reduced by nonsurgical manipulation due to interposion of the extensor carpi ulnaris tendon. The case was a 14-year-old boy who was injured by falling down from a running bicycle. X-ray findings showed markedly separated distal epiphysis of the left ulna with fracture of the distal radius. In spite of manipulation under anesthesia. the epiphyseal separation was irreducible. Operative findings showed that the extensor carpi ulnaris tendon was interposed between the separated ulnar fragments. Each radius and ulna were fixed by Kirschner wires following surgical reduction.
