Fig. 2

Limb salvage in 2 patients with stage IIB osteosarcoma of proximal tibia and distal tibia (case 2 and case 5). a1 and b1 Preoperative MRI examination and a2 and b2 CT 3D reconstruction graphics. a3 and b3 At postoperative 7 days, X-ray showed that the allograft matched well with the host and was firmly fixed. a4 and b4 At postoperative 16 months, X-ray showed that both junctions of the host–donor had healed, and no obvious loosening of internal fixation was found. a5 and b5 CT scan confirmed both junctions had healed completely