Fig. 2

Radiograph A shows the preoperative radiograph of one of the cases receiving an excessively medial anterior approach is presented, where the horizontal distance between the ASIS (blue dot) and the center of rotation of the femoral head (red dot) is represented by distance X, compared to the same distance Y shown in radiograph B, which belongs to a patient in the control group. It is important to highlight that the surgical incision (outlined in orange) depends on the position of the ASIS, thus occasionally being more or less medial relative to the joint and the surrounding tissues