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Congenital dislocation of radial head without any abnormality is rare,and commonly reveals with anomalies in another organs.it can be appearance in one side or two side be cause of late manifestations,diagnosis of congenital dislocation of radial head is usually difficult. It is more important to recognize congenital anomaly of radial head from dislocation of elbow that events in trauma.this article presents one case of congenital dislocatin of radial head that is involved one side with out any anomaly.

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The proximal radioulnar joint plays an important role in elbow and forearm movements. Radial head fracture involves about 20% of the elbow fractures, which is most often accompanied by other damage to the soft or bone tissue. Isolated form is about 2% and bilateral form is rare. Most radial head fractures are the result of low energy and falling down with outstretched hands. Heavy sports injuries, high energy trauma and crashes cause a breakdown with displacement and the possibility of further complications.In this article we  reported a woman  nurse with 35 years old whom suffered pain and swelling of both elbows due to simple falling down with outstretched hands. In the clinical examination, there was a bilateral tenderness and swelling of the elbows. Movements were decreased in right side. There was no nerve defect. In the Xray radiography, bilateral radial head fractures, Mason-type 3 at right and type 1 at left elbow were observed. Right elbow treated by open reduction and internal fixation by mini plate and screws and left side treated by conservative method. The patient was discharged with indomethacin 25 mg 3 times a day for 6 weeks and bilateral long arm splint for 5 to 7 days, active movements were begun. Subsequently, the patient was not adviced for physiotherapy. Complete movements of elbow joints were obtained in right side and left side after 8 and 4 weeks due to teratment. Precise clinical examinations and correct radiographs are necessary to diagnose the bilateral radial head fractures. Early diagnosis and proper treatment and, if necessary, physiotherapy leads to proper improvement and acceptable movements and function.