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a) A posterolateral incision was made to expose the posterior column of the acetabulum, ischial ramus, and acetabulum. An osteotomy guide plate was placed for excision. b) After osteotomy with an oscillating saw, the hip joint was removed together with the femoral segment and the acetabulum, but the continuity of the joint capsule was preserved. c) Customized acetabular component and modular femoral component were placed for reconstruction.
