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Tras la quimioterapia neoadyuvante (quimioterapia temprana), se extirpó completamente el tumor en una primera operación y se implantó una prótesis de crecimiento BioXpand. Al tener que extirpar el cartílago de crecimiento con el tumor, se produjo una discrepancia progresiva en la longitud de las piernas, como era de esperar. Con el nuevo tipo de prótesis de crecimiento utilizado, se pudo evitar una desfigurante rotaplastia y así conservar la pierna de forma visual y funcionalmente atractiva. Además, esta prótesis permitió el crecimiento óseo posterior.",[],[337],"lg:col-span-6",{"_uid":339,"image":340,"title":343,"component":344,"copyright":9,"image_style":345,"component_style":346},"681b5e04-476c-4569-bb0a-6e5d6fa49476",{"id":341,"alt":102,"name":9,"focus":102,"title":102,"filename":342,"copyright":102,"fieldtype":11},1773207,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F768x1538\u002F8b18faf437\u002Fcase10_1.jpg","Niño de 9 años con tumor óseo maligno","Image",[],[347],"col-span-3",{"_uid":349,"image":350,"title":353,"component":344,"copyright":9,"image_style":354,"component_style":355},"3bb80328-fb66-4beb-a733-4e2ba385100e",{"id":351,"alt":102,"name":9,"focus":102,"title":102,"filename":352,"copyright":102,"fieldtype":11},1773208,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F777x1552\u002F302c626ec0\u002Fcase10_2.jpg","Osteosarcoma por encima de la articulación de la rodilla",[],[347],{"_uid":357,"text":358,"component":324,"text_style":359,"component_style":360},"eb1da6c7-dc84-492b-abdb-78b765d5dfe3","## Tratamiento",[],[],{"_uid":362,"text":363,"component":324,"text_style":364,"component_style":365},"cb816814-a9dc-4843-ad55-482184380a72","Debido al crecimiento de la longitud del lado opuesto, había un acortamiento de la pierna izquierda de 8 cm a la edad de 14 años. Con los clavos de distracción FITBONE del BioXpand, tanto el hueso restante de la parte superior como el de la parte inferior de la pierna pudieron alargarse hasta igualarse con el lado opuesto. Esta oportunidad única de que el hueso vuelva a crecer a pesar de una prótesis tumoral sólo es posible con un BioXpand.",[],[337],{"_uid":367,"image":368,"title":371,"component":344,"copyright":9,"image_style":372,"component_style":373},"fd67caef-6c85-477c-9540-f71c37a07f94",{"id":369,"alt":102,"name":9,"focus":102,"title":102,"filename":370,"copyright":102,"fieldtype":11},1773204,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F790x1581\u002Ff12288b779\u002Fcase10_3.jpg","8 cm de acortamiento de la pierna en el lado izquierdo",[],[347],{"_uid":375,"image":376,"title":379,"component":344,"copyright":9,"image_style":380,"component_style":381},"95708aa4-f73b-47d6-8c6d-120455f7ed81",{"id":377,"alt":102,"name":9,"focus":102,"title":102,"filename":378,"copyright":102,"fieldtype":11},1773203,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F804x1608\u002Fcd9f3a2c75\u002Fcase10_4.jpg","Alargamiento de la parte superior e inferior de la pierna",[],[347],{"_uid":383,"text":384,"component":324,"text_style":385,"component_style":386},"ce766152-4fcf-407d-9129-c34cbbe54bb7","## Resultado",[],[],{"_uid":388,"text":389,"component":324,"text_style":390,"component_style":391},"2abe5944-4050-41ff-845d-25b95fa3cfd4","Por último, se retiraron los clavos de distracción intramedulares, y a continuación se insertaron vástagos protésicos recubiertos, que se osteointegran definitivamente en el hueso recién formado. A pesar de la enfermedad tumoral maligna (osteosarcoma), el paciente, que ahora tiene 18 años, tiene dos piernas rectas de igual longitud, ambas articulaciones de la rodilla están a la misma altura y una endoprótesis tumoral está firmemente anclada en el hueso como reemplazo de su propia articulación de la rodilla. Puede caminar sin molestias ni ayudas y tiene una función articular casi normal. Con la prótesis utilizada aquí, se alargó por primera vez el hueso restante y no la prótesis, una ventaja que permite esperar una calidad de vida claramente mejor y mejores resultados a largo plazo.",[],[337],{"_uid":393,"image":394,"title":398,"component":344,"copyright":9,"image_style":399,"component_style":400},"e940c6c0-354d-4bdb-ac38-4ffb5936b3a0",{"id":395,"alt":102,"_uid":396,"name":9,"focus":102,"title":102,"filename":397,"copyright":102,"fieldtype":11},1773206,"87b9632a-6486-45e2-901c-f16f548aeb2a","https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F1722x3442\u002Fb2715bc97a\u002Fcase10_5.jpg","Finalización del tratamiento a los 18 años",[],[347],{"_uid":402,"image":403,"title":406,"component":344,"copyright":9,"image_style":407,"component_style":408},"7855670d-0c96-40d5-99b5-61ef7042a795",{"id":404,"alt":102,"name":9,"focus":102,"title":102,"filename":405,"copyright":102,"fieldtype":11},1773205,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F808x1617\u002F430ff8d02d\u002Fcase10_6.jpg","Piernas rectas de igual longitud",[],[347],{"_uid":410,"title":411,"stories":412,"component":426},"b0322016-634a-4d3f-b56a-f323cbdf48e7","Más información",[413,422],{"uuid":414,"full_slug":415,"content":416},"80bdd36c-bf5a-45ff-b436-2c684df156c9","es\u002Fespectro-de-tratamiento\u002Fprotesis-de-crecimiento",{"_uid":417,"_editable":-1,"image":418,"intro":421,"meta_title":248},"084ba5e0-a756-44b5-8bfe-03aa84616065",{"id":419,"alt":102,"name":9,"focus":102,"title":102,"filename":420,"copyright":102,"fieldtype":11},2692143,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F6083x3089\u002F0b2c23ddd3\u002Fbioxpand.png","Cuando se diagnostica un tumor óseo maligno (osteosarcoma, sarcoma de Ewing) en niños y adolescentes, no sólo hay que resecar el tumor, sino a menudo también el cartílago de crecimiento. El crecimiento normal del lado opuesto da lugar a una diferencia de longitud de las piernas. Con un nuevo tipo de \"prótesis de crecimiento biológico\" (BioXpand) desarrollado en ZEM-Germany, se puede alargar el hueso restante, lo que en muchos casos hace innecesaria la desfigurante rotaplastia y abre opciones de reconstrucción completamente nuevas.",{"uuid":46,"full_slug":54,"content":423},{"_uid":424,"_editable":-1,"image":425,"intro":9,"meta_title":53},"ca719f33-d56b-4cff-b25f-641c7d8ff8b4",{"id":102,"alt":102,"name":9,"focus":102,"title":102,"filename":9,"copyright":102,"fieldtype":11},"Reference",{"id":341,"alt":102,"name":9,"focus":102,"title":102,"filename":342,"copyright":102,"fieldtype":11},"A un paciente de 9 años se le diagnosticó un osteosarcoma maligno de alto grado en la parte distal del muslo izquierdo. Hubo que extirpar la articulación de la rodilla izquierda. A pesar de la necesidad de una endoprótesis tumoral, el niño vuelve a tener dos piernas de igual longitud.","Page",[],[],"A un niño de 9 años se le tuvo que extirpar la articulación de la rodilla debido a un osteosarcoma. A pesar de una articulación de rodilla artificial, fue posible alargar la pierna.","osteosarkom","es\u002Festudios-de-caso\u002Fosteosarcoma-tumor-oseo",130,[],5185868,"6719da23-66e7-48a2-943e-908b46b52e90","2020-12-29T13:15:35.000Z",[],"fallbeispiele\u002Fosteosarkom",[443,447,449,453,457],{"path":444,"name":445,"lang":446,"published":21},"cases\u002Fosteosarcoma","Osteosarcoma","en",{"path":448,"name":291,"lang":204,"published":21},"estudios-de-caso\u002Fosteosarcoma-tumor-oseo",{"path":450,"name":451,"lang":452,"published":21},"drasat-alhalh\u002Falsarkwma-alazmyh-wrm-alazam","الساركوما العظمية (ورم العظام)","ar",{"path":454,"name":455,"lang":456,"published":21},"tematicheskie-issledovaniya\u002Fosteosarkoma-opukhol-kosti","Остеосаркома (опухоль кости)","ru",{"path":458,"name":459,"lang":460,"published":21},"an4-li4-yan2-jiu1\u002Fgu3-rou4-liu2-gu3-zhong3-liu2","骨肉瘤(骨肿瘤)","zh",1793077542659]