Ms. Wang, 19 years old, had paracortical osteosarcoma of the lower femoral segment. Due to the patient’s reason, instead of resection and reconstruction of the tumor segment, a hemipelvectomy of the tumor with inactivation and replantation was performed, preserving the knee structure. The patient has been followed up for 4 years, with no tumor recurrence, no metastasis, and good healing of the femur, but poor knee function, and the patient is satisfied. Zhang Qing, Department of Orthopedics, Second Xiangya Hospital
Conclusion: Marginal resection reconstruction of low-grade malignant tumors is also a worthwhile option with the advantage of biological reconstruction and preservation of the joint as much as possible.