Fig. 1

A–F A thirteen-year-old girl with an osteosarcoma in the proximal aspect of the tibia. A Anteroposterior radiograph showing tumor located at the proximal tibia. B Coronal magnetic resonance image showing the extent of tumor extension with epiphysis involvement. C An intraoperative view showing frosted medial plateau during in situ cryoablation. D An intraoperative view showing the preserved epiphysis after transepiphyseal osteotomy. The ablative bone margin was achieved in this case. E An intraoperative view showing intercalary reconstruction with recycled tumor-bearing bone and vascularized fibular graft. F Anteroposterior radiograph postoperative 54 months showing osteotomies healing with mature callus and mild degenerative change in the medial compartment of the knee. This patient had the MSTS score of 29