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[A contribution to treatment of avulsion fracture of the ischial tuberosity].

Background of the injury and of treatment in two 15 years old girls with avulsion fracture of the ischial tuberosity are presented. The first case with little displacement good result has been achieved after conservative treatment; the second one required surgery 1.5 year due to great displacement, non-union and persistent pain; ischial tuberosity has been removed successfully.