Fig. 3
A, B A windswept-deformity patient having a leg length discrepancy (LLD) caused by an aged femoral shaft fracture. The femur length (FL) is determined by the distance between the femoral head’s center to the knee’s center, while the tibia length (TL) is measured from the knee’s center to the ankle’s center. A leg length discrepancy (LLD) is observed when the sum of the FL and TL varies by more than 1 cm between the varus and valgus sides of the leg