case_images: PMC7718121_01
case_images: MRI of the pelvis, extension of the osteosarcoma metastasis in the left ilium (arrows) in coronal (top) and axial (bottom) view before internal hemipelvectomy.
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case_images: PMC7718121_01_gr1.jpg
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case_images: He was diagnosed with a recurrence of the osteosarcoma presenting with lung metastasis and a huge metastasis of the left Ilium extending close to the acetabulum (Fig. 1).
case_images: Schematic drawing of the preexisting Borggreve-Van Nes rotationplasty (left) and the hemipelvectomy PI-II and hip transposition type 2a (right), attaching the femoral head wrapped into a Treviva tube (polyethylene terephthalate mesh) and suture anchors to the sacrum.
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case_images: PMC7718121_01_gr2.jpg
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case_images: Trevira tube (polyethylene terephthalate mesh, Implantcast, Buxtehude, Germany) that attaches the proximal femur with cortical bone anchors to the sacrum. The femoral head was wrapped directly into the mesh and fixed with tight non-absorbable sutures as described earlier (Fig. 2, Fig. 3).
case_images: Patient standing with prosthesis after hip transposition procedure.
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case_images: PMC7718121_01_gr4.jpg
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case_images: After another two months the patient was walking freely at home and used crutches only for his comfort when leaving home (Fig. 4).