Osteosarcoma is one of the most common primary malignant bone tumors in children and adolescents. In this study, the investigators try to investigate the preliminary effect of 3D printed personalized extendable prosthesis replacement on limb salvage in children with osteosarcoma.
The goal of this type of observational study is to investigate the preliminary effect of 3D printed personalized extendable prosthesis replacement on limb salvage in children with osteosarcoma. The main question it aims to answer is:~Is 3D printed personalized extendable prosthesis replacement has a good outcome in limb salvage pediatric osteosarcoma？