Irreducible Patellar Dislocation; Incarcerated into a Distal Femur Fracture: A Case Report and Review of the Literature

Abstract

Introduction: Patellar dislocation is a relatively common injury. However, in rare circumstances along with dislocation of the patella, some types of fractures occur, making the treatment challenging and difficult. Case Presentation: We report a 28-year-old man with dislocation of the patella, simultaneous Hoffa fracture, and incarcerated patella in lateral femur condyle fracture due to a serious motorcycle accident. Conclusions: Generally, patellar dislocation can be reduced with open reduction or close reduction. There are some indications for open reduction of the patellar dislocation in the literature. We are going to introduce a new indication of open reduction for patellar dislocation and the clinical picture, diagnosis, pathogenesis, and treatment are discussed. Finally, the literature is reviewed based on previous studies.