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Figure 4: Preoperative and postoperative appearance Preoperative appearance: (a) Swelling and valgus of the left knee; (b) Flexion only can approach to 90 degrees. Two years follow-up: (c) Flexion can approach to 120 degrees; (d) Mechanical axis of the distal femur realigned

Figure 4: Preoperative and postoperative appearance Preoperative appearance: (a) Swelling and valgus of the left knee; (b) Flexion only can approach to 90 degrees. Two years follow-up: (c) Flexion can approach to 120 degrees; (d) Mechanical axis of the distal femur realigned