*Anesthesia Management to Improve Outcomes DOI: http://dx.doi.org/10.5772/intechopen.106672*

radiological presentation, microscopic appearance, and evolution. Depending on their location in the bone, 3 groups can be distinguished: superficial osteosarcomas, intracortical osteosarcomas, and intramedullary or central osteosarcomas; the latter being the most frequent. Among intramedullary tumors, various types of high-grade malignancy can be identified: the so-called classic or conventional form, telangiectatic osteosarcoma, and the small cell variant [8]. Although osteosarcoma can affect any bone; it is preferentially located in the metaphyses of long bones. It sits mainly on the knee; distal end of the femur (40%), proximal end of the tibia (15%), or upper end of the femur or humerus (14%), areas that correspond to the bone segments with the greatest growth of the skeleton [8]. (**Figures 1**–**4**) shows part of preparation of the bone piece in a knee osteosarcoma resection surgery in a young patient.
