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Despite the malignant tumor disease (osteosarcoma), the patient, who is now 18 years old, has two straight legs of equal length, both knee joints are at the same height and a tumor endoprosthesis is firmly anchored in the bone as a replacement for his own knee joint. He can walk without discomfort or aids and has almost normal joint function. With the prosthesis used here, the remaining bone and not the prosthesis was lengthened for the first time - an advantage that allows us to expect a significantly better quality of life and better long-term results.",[],[330],{"_uid":386,"image":387,"title":391,"component":337,"copyright":9,"image_style":392,"component_style":393},"e940c6c0-354d-4bdb-ac38-4ffb5936b3a0",{"id":388,"alt":96,"_uid":389,"name":9,"focus":96,"title":96,"filename":390,"copyright":96,"fieldtype":11},1773206,"87b9632a-6486-45e2-901c-f16f548aeb2a","https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F1722x3442\u002Fb2715bc97a\u002Fcase10_5.jpg","Completion of treatment at 18",[],[340],{"_uid":395,"image":396,"title":399,"component":337,"copyright":9,"image_style":400,"component_style":401},"7855670d-0c96-40d5-99b5-61ef7042a795",{"id":397,"alt":96,"name":9,"focus":96,"title":96,"filename":398,"copyright":96,"fieldtype":11},1773205,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F808x1617\u002F430ff8d02d\u002Fcase10_6.jpg","Straight legs of equal length",[],[340],{"_uid":403,"title":404,"stories":405,"component":419},"b0322016-634a-4d3f-b56a-f323cbdf48e7","More information",[406,415],{"uuid":407,"full_slug":408,"content":409},"80bdd36c-bf5a-45ff-b436-2c684df156c9","en\u002Fexpertise\u002Fgrowth-prosthesis",{"_uid":410,"_editable":-1,"image":411,"intro":414,"meta_title":241},"084ba5e0-a756-44b5-8bfe-03aa84616065",{"id":412,"alt":96,"name":9,"focus":96,"title":96,"filename":413,"copyright":96,"fieldtype":11},2692143,"https:\u002F\u002Fa.storyblok.com\u002Ff\u002F56859\u002F6083x3089\u002F0b2c23ddd3\u002Fbioxpand.png","When a malignant bone tumor (osteosarcoma, Ewing's sarcoma) is diagnosed in children and adolescents, not only the tumor but often also the growth plate must be resected. The normal growth of the opposite side results in a leg length difference. With a new type of \"biological growth prosthesis\" (BioXpand) developed at ZEM-Germany, the remaining bone can be lengthened, which in many cases makes disfiguring rotationplasty unnecessary, and opens up completely new reconstruction options.",{"uuid":44,"full_slug":52,"content":416},{"_uid":417,"_editable":-1,"image":418,"intro":9,"meta_title":51},"ca719f33-d56b-4cff-b25f-641c7d8ff8b4",{"id":96,"alt":96,"name":9,"focus":96,"title":96,"filename":9,"copyright":96,"fieldtype":11},"Reference",{"id":334,"alt":96,"name":9,"focus":96,"title":96,"filename":335,"copyright":96,"fieldtype":11},"A 9-year-old patient was diagnosed with a high-grade malignant osteosarcoma in the left distal thigh. The left knee joint had to be removed. Despite the need for a tumor endoprosthesis, the boy has two legs of equal length again.","Page",[],[],"A 9-year-old boy had to have his knee joint removed due to osteosarcoma. 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