Homolateral Hip Dislocation, Floating Hip Injury, and Floating Knee Injury: A Unique Presentation of a Rare Injury

Floating joint injury is an unusual injury pattern that is hard to deal with and often caused by high-energy trauma. In this report, a patient had a homolateral floating hip injury (FHI), floating knee injury (FKI), and hip dislocation at our hospital, and there was no case reported before. Case Presentation: A 48-year-old driver who encountered a traffic accident was seen. Radiologic examination revealed acetabulum comminuted fractures and hip joint posterior dislocation with some fracture pieces in the joint space on the left side. The femur, tibia, and fibula were simultaneously disrupted with open trauma of the left calf. Open reduction and screw-plate fixation of the acetabulum fracture, intramedullary nail fixation of the femoral fracture, and external fixator for his tibia and fibula fracture were carried out. Conclusion: The treatment of multiple fractures should focus on life-threatening injuries above all, and then deal with the fractures according to the situation of the patient. Open reduction and internal fixation are priority choices except in some special cases like where soft tissue is in poor condition. Individual therapy and early rehabilitation are effective for homolateral FHI and FKI.