Tehran University of Medical Sciences Journal of Orthopedic and Spine Trauma 2538-2330 3 2 2017 05 22 96 96 SM Javad Mortazavi Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, IR Iran Seied Hadi Kalantar Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, IR Iran Mohammadjavad Dehghani Firoozabadi Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, IR Iran Saeed Panahi Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, IR Iran Ahmad Ramezanpoor Asl Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, IR Iran 2019 07 18 Introduction: Periprosthetic fracture, after total knee arthroplasty, is one of the most common reasons of revision arthroplasty and periprosthetic fracture of the patella has been shown to be very rare. Literature review has shown no reports of periproshtetic fracture of the patella around tumor endoprosthesis. Only 1 study has discussed management of open periprosthetic fractures of the patella as this type of fracture is extremely rare. Case Presentation: We report a particular open periprosthetic fracture of the patella around a tumor endoprosthesis in a 60 years old female, that was treated with irrigation and debridement and tension band wiring and 3 month of follow up showed satisfactory range of motion with no extension lag. Conclusions: Despite the fact that operative management of periprosthetic fractures of the patella has a high rate of complications and poor outcome, it can be considered for patients with open periprosthetic fractures of the patella, especially when the extensor mechanism is compromised. https://jost.tums.ac.ir/index.php/jost/article/view/96 https://jost.tums.ac.ir/index.php/jost/article/download/96/96