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A 64-year-old woman who had had arthritis with extra-articular deformity. a Preoperative standing full-length radiograph showing 15° valgus deformity caused by malunited proximal tibial fracture, which resulted in a mechanical axis deviation of 11°. b Postoperative radiograph made 6 months after one-stage TKA with intra-articular bone resection and soft tissue balancing, showing restoration of the mechanical axis
