case_images: PMC11823868_01
case_images: Pre-operative anteroposterior radiograph of the pelvis shows a hypoplastic left hemipelvis, left hip autofusion with shortening, and an internal rotation contracture.
case_images: JOCR-15-161-g001.jpg
case_images: PMC11823868_01_JOCR-15-161-g001.jpg
case_images: F1
case_images: A pelvic radiograph revealed left hip fusion, severe dysplasia, and complete obliteration of the joint space (Fig. 1).
case_images: (a-c) Pre-operative 3D reconstruction imaging of a computed tomography scan of the left hip with anterior, lateral, and posterior views shows circumferential autofusion with complete loss of joint space.
case_images: JOCR-15-161-g002.jpg
case_images: PMC11823868_01_JOCR-15-161-g002.jpg
case_images: F2
case_images: Computed tomography (CT) reconstruction was performed to evaluate the patient's acetabular bone stock and native femoral version, demonstrating a thinned native posterior wall and increased femoral anteversion compared to the contralateral hip (Fig. 2).
case_images: Immediate post-operative anteroposterior radiograph of the pelvis demonstrating adequate alignment of implants with restored length and rotation.
case_images: JOCR-15-161-g003.jpg
case_images: PMC11823868_01_JOCR-15-161-g003.jpg
case_images: F3
case_images: Final implants included a 62 mm multi-hole acetabular shell secured with five screws, a neutral lip liner, and a cementless size 4 femoral stem with a 40 mm standard head (Fig. 3).
case_images: (a and b) Post-dislocation radiographs. Anteroposterior and cross-table lateral views of the left hip demonstrating anterior-superior displacement of the prosthetic femoral head.
case_images: JOCR-15-161-g004.jpg
case_images: PMC11823868_01_JOCR-15-161-g004.jpg
case_images: F4
case_images: Radiographs revealed anterior-superior dislocation of the prosthetic femoral head (Fig. 4). Subsequent radiographs demonstrated complete acetabular cup dislodgement superior to the greater trochanter (Fig. 4,5).
case_images: Twelve-month post-revision radiograph. Anteroposterior view of the pelvis demonstrating stable alignment of all arthroplasty components with no signs of loosening or subsidence. Heterotopic ossification is evident in the proximal femur.
case_images: JOCR-15-161-g006.jpg
case_images: PMC11823868_01_JOCR-15-161-g006.jpg
case_images: F6
case_images: ROM showed 90  flexion, 29  abduction, 28  adduction, 35  external rotation, and 5  internal rotation. Radiographs showed maintained alignment of all components with no signs of loosening (Fig. 6).
case_images: (a and b) Thirty-four-month post-revision radiographs. Anteroposterior and cross-table lateral views of the left hip redemonstrating stable alignment of the revision prosthesis without progression of heterotopic ossification.
case_images: JOCR-15-161-g007.jpg
case_images: PMC11823868_01_JOCR-15-161-g007.jpg
case_images: F7
case_images: Final radiographs redemonstrated a stable prosthesis without further development of HO (Fig. 7).