case_images: PMC6754929_01
case_images: Preoperative AP pelvis X-ray showing femoral head osteolytic lesion (blue arrow).
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case_images: PMC6754929_01_CRIOR2019-9262190.001.jpg
case_images: fig1
case_images: Radiographs showed an epiphyseal lytic lesion of the proximal femur with the involvement of the fovea (Figure 1).
case_images: T2 MRI views of the left hip: coronal view (a) and axial view (b) of the hip with joint effusion (orange arrows).
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case_images: PMC6754929_01_CRIOR2019-9262190.002.jpg
case_images: fig2
case_images: An associated joint effusion was noted, as well as bone marrow edema (Figure 2).
case_images: CT-Scan axial view illustrating a 3.5 x 3.2 x 2 cm lesion with sclerotic borders and intralesional calcifications (blue arrow).
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case_images: PMC6754929_01_CRIOR2019-9262190.003.jpg
case_images: fig3
case_images: A computerized tomography scan (CT-Scan) showed a well-defined lesion of 3.5 x 3.2 x 2 cm with sclerotic borders and intralesional calcifications suggestive of a chondroid-like matrix (Figure 3).
case_images: (a) Surgical view of the femoral head lesion following anterior hip dislocation. (b) Surgical view of the femoral head showing congruent graft surface with the radius of the host femoral head.
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case_images: PMC6754929_01_CRIOR2019-9262190.004.jpg
case_images: fig4
case_images: The hip was carefully dislocated anteriorly (Figure 4(a)). The donor graft surface curvature was congruent with the radius of the host femoral head (Figure 4(b)).
case_images: (a) Immediate postoperative AP pelvis radiography showing the two 4.0 mm cannulated screws stabilizing the greater trochanter osteotomy. (b) Two-year postoperative AP X-ray showing good graft position without head collapse or degenerative changes, as well as heterotopic ossification at the tip and lateral to the greater trochanter (orange arrows). (c) Six-year postoperative AP X-ray showing femoral head inferior osteophyte with narrowing of the joint space (blue arrow). (d) Seven-year postoperative AP X-ray showing discrete progression of femoral head inferior osteophyte (blue arrow).
case_images: CRIOR2019-9262190.005.jpg
case_images: PMC6754929_01_CRIOR2019-9262190.005.jpg
case_images: fig5
case_images: Postoperative radiographs showed proper graft positioning and restoration of joint line congruity (Figure 5(a)). There was no tumor recurrence, no head collapse, and no degenerative changes (Figure 5(b)). On X-rays, there were minor degenerative changes with inferior femoral head osteophytes and joint space narrowing medially (Figure 5(c)). There was minor progression of previously described degenerative changes (Figure 5(d)).
case_images: Histopathological sections of the lesion: (a) intracellular calcification, (b) mononuclear cells with a characteristic pale cytoplasm, and (c) positive S100 immunolabeling within chondroblast cells.
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case_images: PMC6754929_01_CRIOR2019-9262190.006.jpg
case_images: fig6
case_images: The pathologist confirmed the diagnosis of chondroblastoma on histopathological examination (see Figure 6).
case_images: Axial CT-Scan of the left hip: (a) 2 years postoperatively and (b) 6 years postoperatively.
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case_images: PMC6754929_01_CRIOR2019-9262190.007.jpg
case_images: fig7
case_images: Radiographs and a CT-Scan confirmed proper graft incorporation (see Figure 7(a)). The osteoarticular allograft still looked intact on the CT-Scan images (Figure 7(b)).
case_images: Postoperative MRI of the left hip at 6 years: (a) T1 AP view and (b) T1 axial view of a well-integrated osteochondral graft.
case_images: CRIOR2019-9262190.008.jpg
case_images: PMC6754929_01_CRIOR2019-9262190.008.jpg
case_images: fig8
case_images: There were no signs of local recurrence in the femoral head (Figure 8).