[Objective]To analyze the reasons of the missed and misdiagnosis of popliteal artery injury associated with knee dislocations, so that the patients can be diagnosed as early as possible.Amputation can be avoided.[Method]Twelve patients admitted in our hospital 1998～2003 who were misdiagnosed in other hospitals.Five patients had compound injured.The misdiagnosis time was 8～50 hours,meaned 22.6 hours.Five patients had an arteriogram after registes,one of them was recanalizated in radiology department.Other 6 patients were oqerated with saphenous vein bypass grafting,2 patients were anastomosed the end to the end and 3 patients were amputated directly.[Result]Three patients were healed completely,2 patients remained ischemic symptoms,4 patients were operated again with amputation.[Conclusion]There are four reasons for the missed and misdiagnosis:a.The doctors were not familiar with the anatomy of the popliteal artery;b.The knee was automatically reduction in the process of transmitting.There was no deformity when arriving at the hospital;c.The patients were severely injuried and the knee dislocations was ignored.d.The physical examination was not carefully done.

[Objective]To introduce a surgical technique used in the treatment of giant cell tumor of bone.[Method]Twenty-one patients were treated in our hospital from 1995 to 2003 for bone tumors of Campanacci Ⅰ~Ⅱ.All patients underwent curettage and "T" shape autologous bone transplantation and phenol.The patients were followed up for 18~24 months.[Result]Eighteen patients were healed on the basis of the duration,all knees presented no function limited.Two patients had local recurrence 8 to 10 months after the treatment.[Conclusion]For the giant cell tumor of bone around the knee,curettage and adjuvant "T" shape autologous bone transplantation is a good alternative method of reconstruction.