A new technique of endoprosthetic replacement for osteosarcoma of proximal femur with intra-articular extension

摘要

INTRODUCTIONOsteosarcoma is the most common primary malignant tumour of bone and commonly involved sites are the distal femur, proximal tibia, and humerus. Osteosarcoma of proximal femur usually arises at the metaphysis and articular cartilage acts as a relative barrier to tumour spread, with extension into the hip joint being extremely rare.