{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T21:15:40Z","timestamp":1777929340637,"version":"3.51.4"},"reference-count":17,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Orthop Surg (Hong Kong)"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Proximal femoral tumor resection poses a major challenge in orthopaedic oncology, particularly in very young pediatric patients (&lt;9 years), where the need to preserve function and limb length collides with the limited availability of reconstructive options (3D-printed implants, endoprostheses, biological constructs such as vascularized fibular grafts, and allograft-prosthetic composites) or leads to amputation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To describe in detail the surgical technique for proximal femoral tumor resection and reconstruction using an allograft-prosthetic composite (APC) with a proximal humerus allograft plus a hip prosthesis, documenting its applicability and outcomes regarding function, allograft survival, and oncologic disease status in two pediatric cases treated at a national cancer referral center in Bogot\u00e1, Colombia.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We report two pediatric cases and detail the surgical technique used for proximal femoral reconstruction after tumor resection, based on an APC (proximal humerus allograft + hip prosthesis). Data were collected from medical records with radiological and functional follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>In both patients, proximal femoral reconstruction using our technique yielded a stable construct with preservation of limb function (MSTS &gt;72), documented graft incorporation at 3 months, local disease control, and only one recorded complication (contact dermatitis).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Proximal femoral reconstruction using an APC with a proximal humerus allograft is a viable and safe surgical option in pediatric patients with Ewing sarcoma. In our experience, the technique was successfully applied in two patients, allowing limb preservation with a favorable course. Thus, it offers a functional and reliable option for limb salvage in selected cases.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10225536251406432","type":"journal-article","created":{"date-parts":[[2025,12,7]],"date-time":"2025-12-07T13:54:37Z","timestamp":1765115677000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Oncologic reconstruction of the proximal femur in children younger than 9 years using a proximal humerus allograft and a hip prosthesis: Report of two cases and description of the surgical technique"],"prefix":"10.1177","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6549-9215","authenticated-orcid":false,"given":"Ivan Mauricio","family":"Rodriguez Macias","sequence":"first","affiliation":[{"name":"Pontificia Universidad Javeriana"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juan Fernando","family":"Chaustre","sequence":"additional","affiliation":[{"name":"National Cancer Institute"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriel","family":"Narvaez","sequence":"additional","affiliation":[{"name":"National Cancer Institute"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luis Carlos","family":"Gomez","sequence":"additional","affiliation":[{"name":"Orthopedic Oncologist, Department of Orthopedic Oncology, National Cancer Institute, Bogot\u00e1, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrea","family":"Franco","sequence":"additional","affiliation":[{"name":"Orthopedic Oncologist, Department of Orthopedic Oncology, National Cancer Institute, Bogot\u00e1, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Camilo","family":"Soto Montoya","sequence":"additional","affiliation":[{"name":"Orthopedic Oncologist, Department of Orthopedic Oncology, National Cancer Institute, Bogot\u00e1, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,12,7]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1470-2045(09)70286-4"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1053\/j.semdp.2014.01.002"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1634\/theoncologist.11-5-503"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12094-012-0798-y"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-008-0303-7"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999.0000000000000055"},{"issue":"8","key":"e_1_3_3_8_2","first-page":"1174","article-title":"Endoprosthetic reconstruction after resection of bone tumors in children","volume":"92","author":"Ayerza MA","year":"2010","unstructured":"Ayerza MA, Muscolo DL, Aponte-Tinao LA, et al. Endoprosthetic reconstruction after resection of bone tumors in children. J Bone Joint Surg Br 2010; 92(8): 1174\u20131178.","journal-title":"J Bone Joint Surg Br"},{"key":"e_1_3_3_9_2","first-page":"1","article-title":"A new proximal femur reconstruction technique after bone tumor resection in a very small patient","volume":"2021","author":"Zoccali C","year":"2021","unstructured":"Zoccali C, Careri S, Attala D, et al. A new proximal femur reconstruction technique after bone tumor resection in a very small patient. Case Rep Orthop 2021; 2021: 1\u20138.","journal-title":"Case Rep Orthop"},{"issue":"2","key":"e_1_3_3_10_2","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1016\/j.recot.2018.10.006","article-title":"Sarcoma de Ewing: an\u00e1lisis de supervivencia con terapia multidisciplinar","volume":"63","author":"Borrego-Paredes E","year":"2019","unstructured":"Borrego-Paredes E, Prada-Chamorro E, Chac\u00f3n-Cartaya S. Sarcoma de Ewing: an\u00e1lisis de supervivencia con terapia multidisciplinar. Rev Espa\u00f1ola Cirug\u00eda Ortop\u00e9dica Traumatol 2019; 63(2): 86\u201394.","journal-title":"Rev Espa\u00f1ola Cirug\u00eda Ortop\u00e9dica Traumatol"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijscr.2024.109815"},{"key":"e_1_3_3_12_2","first-page":"1","article-title":"Long-term results of uncemented allograft prosthesis composite reconstruction for proximal femur tumors","volume":"22","author":"Liu C","year":"2021","unstructured":"Liu C, Min L, Zhou Y. Long-term results of uncemented allograft prosthesis composite reconstruction for proximal femur tumors. BMC Muscoskelet Disord 2021; 22: 1\u20135.","journal-title":"BMC Muscoskelet Disord"},{"key":"e_1_3_3_13_2","doi-asserted-by":"crossref","unstructured":"Campanacci DA Donati D Mercuri M et al. Allograft\u2013prosthesis composite after proximal femur bone tumor resection in pediatric patients: early series and technical considerations. Manuscript in preparation; 2024.","DOI":"10.1177\/18632521241269338"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2018.10.020"},{"key":"e_1_3_3_15_2","first-page":"225","article-title":"Allograft-prosthetic composite in proximal femur resections for tumor","volume":"439","author":"Muscolo DL","year":"2005","unstructured":"Muscolo DL, Ayerza MA, Aponte-Tinao LA, et al. Allograft-prosthetic composite in proximal femur resections for tumor. 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