Fig. 1.

According to the technique described by Ruwe et al. [15], femoral anteversion can be measured clinically with the patient prone and knee flexed to 90°. The examiner feels for the greater trochanter of the femur and rotates the hip until the trochanter is most prominent laterally. In this position, the degree of femoral anteversion is estimated as the angle between the long axis of the tibia and a vertical line