Abstract

Introduction The proximal femur is a common siteforprimary bone sarcomas, includingEwing's sarcoma, chondrosarcoma, osteosarcoma, and giant celltumors (GCT). Extensive resections arechallengingto reconstruct because the size of the tumormay necessitate an extensive resection ofthefemur to achieve adequate oncologic clearance. The resection of the proximal femur can result inhip jointinstabilitydue totheloss of the strong native hipcapsule orhip abductor strength. With a wide range of reconstruction options,such asresection arthrodesis, allograft-prosthetic composite (APC),andendoprosthesis,we can achieve limb salvage with good functionaloutcomes. Objective The objective of this case series isto evaluate the clinical outcomes and complications associatedwith endoprosthesis replacement in patients with proximal femur tumors. Methods A prospective analysis was conducted with 32 patients who underwent modular endoprosthesis replacement for proximal femoral tumors at our institution. Patient data, tumor characteristics, surgicaldetails, and postoperative outcomes were collected and analyzed. Results The study involved 32 patientswho met theinclusion criteria.Theywere assessed usingthe MusculoskeletalTumor Society Score (MSTS), which showedgoodfunctional outcomesin72.84%of the patients. The study highlights the functionaloutcomes and potential complications associated with the use of modular prostheses. Conclusion Endoprosthesis replacement in proximal femur tumors is a viable treatment option, providinggood functional outcomes and an acceptable method for limb salvage, which enhances the quality of life.

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