Fig. 1

The process of surgical operation. a To perform borehole and bearizing on the center of the femur head under the conducting by a director. b To resect the acetabular labrum and burr until bleeding on the cartilage articularis, to impact the appropriate acetabular prosthesis with a position of 40° abduction and 20° anteversion, and to pressure for stabilization. c To burr the femur head using the barrel file and to resect the cystic lesion. d To embed the femoral prosthesis and fix with bone cement. Intraoperative photograph showing the embedded femoral prosthesis fixed with bone cement