The objectives of this study is to evaluate the incidence and the complicated results of pediatric ankle fracture.

The injuries of the ankle in children occur mostly at physis rather than ligamentous structure, and the injuries of the physis may result in arrest of the growth of physis and these may lead to angular deformity, joint incongruity, and growth disturbance, which are frequently reported in the literatures.

Accurate treatment under the clear understanding of mechanism of injury in very important for preventing this complications.

We reviewed 17 cases of pediatric ankle fracture, from June 1990 to June 1994 and followed up for more than 1 year at department of orthopaedic surgery Kangbuk Samsung Hospital.

We could obtain results as follows;

1. The mean age was 1 1 years old, and predominant in male.

2. Sports injury was the most common cause.

3. According to modified Dias and Tachdjan classification, supination inversion type was the most common and according to Salter Harris classification, type II was.

4. Eight cases were treated by closed reduction and immobilizatior in a plaster cast, and other nine by open reduction and internal fixation, among them, three cases had complications, such as angular deformity, Joint incongruity, and premature closure of physis.