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A 36-year-old patient with G3 mesenchymal chondrosarcoma. (A) intraoperative picture of modified epaulette intraoperative access for total sacrectomy including open biopsy tract. (B) Intraoperative picture after tumor removal and (C) surgical specimen. (D) Intraoperative custom-made endoprosthesis realized with 3D-printing technology (MUTARS® Implantcast Gmbh, Buxtehüde, Germany). (E) Postoperative radiograph.
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