Thirty-eight patients under went operative treatment for fractures of the ankle. Their ages ranged from 15 to 76 with an average of 43 years. The factors which influenced the prognosis ware evaluated for these cases. It was found that the type and the stage of Lauge-Hansen's classification, etiology of the injury, the degree of reduction, age of the patient, crushed fragments, presence or absence of compression deformity and of the rupture to the deltoid ligament were the related factors. Evaluation of these factors would enable us to estimate the clinical results in some degree.
