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Abstract Objective To explore the surgical indications,clinical effects and complications of tumor type knee joint prosthesis combined with large segment allograft and vascularized fibula reconstruction in the treatment of periarticular tumors of the knee joint.Methods From June 2010 to June 2015,51 cases of periarticular tumor in our center were analyzed retrospectively,including 28 males and 23 females,aged 7~61 years with an average of (17.8±1.2) years.There were 37 cases of osteosarcoma,12 Ewing’s sarcoma,1 case of recurrence of giant cell of bone,1 case of chondrosarcoma grade Ⅱ.31 cases involved the distal femur and 20 cases involved the proximal tibia.There were 33 cases of tumor type knee arthroplasty,20 of which were located in the femur,13 in the tibia,18 in the femur,11 in the femur and 7 in the tibia.Results all 51 patients were followed up for 47~71 months,with an average of (58.0±3.0) months.14 patients (27.5%) died,23 patients (45.1%) had pulmonary metastasis,3 patients (5.9%) had local recurrence,6 patients(11.8%) had postoperative infection,and 5 patients (9.8%) survived without tumor.The mean score of the patients with tumor type knee prosthesis replacement was (24.5±2.1),and the mean score of the patients with vascularized fibula reconstruction was (26.1±1.7).Conclusion Limb salvage surgery has become the main treatment of malignant tumors around the knee joint.Tumor type knee prosthesis is the main reconstruction method,with the advantages of early weight-bearing,good stability,early complications and so on.The reconstruction of fibula with vascularization combined with massive allograft has certain advantages for the patients whose epiphysis is not obviously involved and whose expected survival time is longer,but there are many postoperative complications,so the indications must be strictly controled.
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