Partial replacement of pelvis with the hip joint in osteosarcoma treatment: A case report.
Introduction
and importance: Pelvic osteosarcoma is quite rare and is a challenging task for orthopedic surgeons. This aim of this study is to present the first case report using customized 3D-printed prosthesis in Vietnam.


Case presentation
57-year-old male was diagnosed with pelvic osteosarcoma. After neoadjuvant chemotherapy, we did limb-salvage surgery after partial pelvic resection. He had to undergo another surgery due to an infection complication that exposed part of the prosthesis. At 6 months follow-up, the patient's overall status was stable. VAS score when moving is 2/10. He can walk with one crutch. Patient is still being followed up and treated.


Clinincal discussion
Management of pelvic osteosarcoma remains a challenging task for orthopedic surgeons. Advancements in customized 3D-printed prosthesis have been applied in treatment of pelvic osteosarcoma. Despite the complications, the results are promising. We believe that this is a new and innovative route in surgery of pelvic osteosarcoma.


Conclusion
Using customized 3D-printed prosthesis is a good way for management of pelvic osteosarcoma.
['Tran Trung|Dung|D|', 'Quang|Sang Nguyen Tran|SNT|', 'Trung|Hieu Pham|HP|', 'Tu|Nam Vu|NV|', 'Sy Quyen|Nang Vo|NV|', 'Duc|Thanh Tran|TT|', 'Dung|Nguyen Tien|NT|', 'Son|Tran Thiet|TT|', 'Viet Dung|Pham Thi|PT|', 'Van Truong|Nguyen|N|']
Osteosarcoma Case report 3D printed Bone tumor Pelvic replacement