In certain challenging cases where tumors affect the entire femur, extending from the knee to the hip, reconstructive options are employed. The fibula, a non-weight-bearing bone typically 20-25 centimeters in length, can be harvested from the patient's lower leg. By utilizing segments of this autologous bone graft, a significant defect of 35-40 centimeters in the femur can be reconstructed. To achieve physiological bone thickness and enhanced structural stability, the fibula can be folded or combined with a frozen allograft. Post-operatively, the expected outcome is for the transplanted bone to heal and fully integrate, eventually being accepted by the body as its own, a process that typically occurs within approximately one year.