Bone tumors, commonly known as "bone cancer", tend to occur in adolescents, and their rapid development, poor prognosis, and high mortality rate are among the most cruel cancers. With the advancement of neoadjuvant chemotherapy, limb salvage surgery has become the main mode of treatment. However, the postoperative malignant bone tumor is currently a difficult point in clinical practice. Recently, the Department of Orthopedics of Tongji Hospital Affiliated to Tongji University has completed two difficult posterior joint replacement surgeries for femoral malignant bone tumors** using hinged artificial knee prostheses, and successfully performed limb salvage surgery for two young female patients.
Case 1: The patient, Ms. Fan (30 years old), underwent surgery in the hospital for a pathological fracture of the distal right femur two years ago**, and was pathologically diagnosed with aggressive giant cell tumor of bone after surgery.
Preoperative x-ray findings.
For this sudden bad news, the patient was difficult to accept for a while, and then came to the orthopedic outpatient clinic of Tongji Hospital affiliated to Tongji University for treatment. After careful preoperative examination and evaluation, it was found that the femoral artery of the patient had not been completely surrounded by the tumor, which created good conditions for limb salvage surgery. Recently, under the guidance of Professor Fan Jian, Director of the Department of Orthopedic Trauma and Orthopedics of Tongji Hospital, the team of Chief Physician Li Shanzhu and Dr. Cai Tao of the Department of Orthopedics completely resected the diseased distal femur tumor and installed a new hinged artificial knee prosthesis. The operation went very smoothly, and the postoperative x-ray showed that the patient's knee joint was in good function and was currently in the first place.
Postoperative imaging. Case 2:
The patient, Ms. Dong (32 years old), underwent limb-salvage surgery for left femoral paracortical osteosarcoma two years ago, and imaging showed a tumor four years after surgery**. Due to the large size of the tumor, most hospitals recommend amputation.
With a glimmer of hope, the patient went to the outpatient clinic of Yuan Feng, deputy director of the Department of Orthopedics of Tongji Hospital Affiliated to Tongji University. After completing the preoperative examination, it was found that the femoral artery and femoral vein were embedded in the tumor gap. In view of the patient's strong desire to salvage his limbs, Yuan Feng led Cai Tao and other relevant teams to successfully separate the femoral artery and femoral vein in the tumor gap under the premise of complete resection of the tumor, and performed hinged knee prosthesis replacement for the patient, successfully completing the patient's limb salvage surgery.
Preoperative imaging.
Postoperative imaging.
With the development of science and technology, the rise of hinged knee prostheses has brought new hope to many patients with malignant bone tumors. The Department of Orthopedics of Tongji Hospital Affiliated to Tongji University, as a national key clinical specialty construction project department and the most important clinical key discipline in Shanghai, under the leadership of Director Cheng Liming, is actively promoting the development of minimally invasive, refined and intelligent surgery, striving to solve the biggest problems of patients with the smallest trauma and doing its best to escort the health of the people.
Expert presentation. 
Dr. Cheng Liming, M.D., is the second-level chief physician, doctoral supervisor, director of the Department of Orthopedics, director of the Department of Orthopedic Spine Surgery, Tongji Hospital, Tongji University, and a tenured distinguished professor and deputy director of the Department of Medicine and Life Sciences of Tongji University.
He is a director of the International Society of Neuroprosthodontics (IAANN), vice chairman of the Neurotransformation Research Committee of Chinese Research Hospitals, vice chairman of the Osteoporosis Prevention and Orthopedic Committee of the Chinese Medical Association, and vice president of the Orthopedic Branch of the Shanghai Medical Doctor Association. He has taken the lead in winning more than 10 provincial and ministerial awards, such as the first prize of the Science and Technology Award of the Chinese Medical Association and the first prize of the Huaxia Medical Science and Technology Award. He was selected into the talent programs of Shanghai Leading Talents and Shanghai Excellent Discipline Leaders. He has won the honors of National Young and Middle-aged Experts with Outstanding Contributions, National Special Allowance, New Century Outstanding Talents of the Ministry of Education, Outstanding Contribution Award for Shanghai Medical Development, and Shanghai Leading Talents.
Dr. Fan Jian, Chief Physician, Doctoral Supervisor, Director of the Department of Orthopedics and Traumatology, Tongji Hospital, Tongji University.
He is a member of the Traumatology Group of the Orthopaedic Branch of the Shanghai Medical Association, a member of the Bone Oncology Group of the Orthopaedic Branch of the Shanghai Medical Doctor Association, a member of the Traumatology Group of the Shanghai Association of Integrative Traditional and Western Medicine, and a member of the Youth Group of the Chinese Department of the International Society of Orthopaedics and Trauma Surgery (SICOT). He has been engaged in the clinical work of trauma and orthopedics for a long time, and has considerable experience in the diagnosis and treatment of complex limb trauma, acetabular pelvic fractures, wrist and elderly osteoporotic fractures.
Yuan Feng is the chief physician, professor and doctoral supervisor, and the deputy director of the Department of Orthopedics, Tongji Hospital, Tongji University.
He is a member of the Traumatology Group of the Shanghai Orthopaedic Branch of the Chinese Medical Doctor Association and a member of the Chinese Reconstructive and Reconstructive Surgery Committee. From May to July 2009, he was invited to be a visiting scholar at Mississippi Medical Center and has been invited to Germany, Switzerland and other countries for exchange and Xi. He has successively undertaken 2 projects of Shanghai Municipal Health Bureau and Shanghai Municipal Science and Technology Commission. He has published more than 80 articles in academic journals at home and abroad, including 20 articles included in SCI.
Li Shanzhu, Chief Physician of the Department of Orthopedics, Tongji Hospital, Tongji University.
He has been engaged in orthopedic medical teaching and research for 33 years, systematically mastered the basic theories and cutting-edge new theories and technologies of limb and pelvic surgery, introduced the concept of minimally invasive surgery into the field of trauma orthopedics earlier in China, presided over two scientific and technological support projects of Xinjiang Science and Technology Department and two scientific research projects of Shanghai Municipal Health Bureau, and participated in a number of national projects as the main researcher. He is good at the diagnosis and treatment of bone and joint injuries, and can independently complete major and difficult limb fracture surgeries.