[Surgical treatment of malignant bone neoplasms at level of the knee with wide resection and reconstitution with non-conventional endoprosthesis]. / Tratamento cirúrgico dos tumores ósseos malignos ao nível do joelho através da ressecção ampla e reconstituição com endoprótese não convencional.

Forty-five patients with malignant bone tumors of the knee were submitted to wide resection and reconstitution of the joint with a custom made endoprosthesis. The mean follow-up was seven years and seven months. There were observed nine complications: in four cases the tumor recurred locally and in one case an artery was injured. The end result was considered good in 36 patients and poor in nine patients. The better results achieved in recent years were due to modifications introduced in chemotherapy for the osteosarcoma, the new system of staging of the bone tumors and new oncological and compartmental surgical techniques.