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Patella Fracture
Andrew Sonin, MD, FACR; Donna G. Blankenbaker, MD
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KEY FACTS

  • Imaging

    • Top Differential Diagnoses

      • Pathology

        • Clinical Issues

          TERMINOLOGY

          • Synonyms

            • Kneecap fracture
          • Definitions

            • Patella fracture ± extensor mechanism disruption
            • Extensor mechanism: Quadriceps tendon, patella, and patellar tendon

          IMAGING

          • General Features

            • Radiographic Findings

              • CT Findings

                • MR Findings

                  • Nuclear Medicine Findings

                    • Imaging Recommendations

                      DIFFERENTIAL DIAGNOSIS

                        PATHOLOGY

                        • General Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      • Reporting Tips

                                        Selected References

                                        1. Della Rocca GJ: Displaced patella fractures. J Knee Surg. 26(5):293-9, 2013
                                        2. Lazaro LE et al: Effect of computerized tomography on classification and treatment plan for patellar fractures. J Orthop Trauma. 27(6):336-44, 2013
                                        3. Lee BJ et al: Adolescent patellar osteochondral fracture following patellar dislocation. Knee Surg Sports Traumatol Arthrosc. 21(8):1856-61, 2013
                                        4. Dy CJ et al: Meta-analysis of re-operation, nonunion, and infection after open reduction and internal fixation of patella fractures. J Trauma Acute Care Surg. 73(4):928-32, 2012
                                        5. Dupuis CS et al: Injuries and conditions of the extensor mechanism of the pediatric knee. Radiographics. 29(3):877-86, 2009
                                        6. Sheth NP et al: Periprosthetic patellar fractures. J Bone Joint Surg Am. 89(10):2285-96, 2007
                                        7. Drabicki RR et al: Stress fractures around the knee. Clin Sports Med. 25(1):105-15, ix, 2006
                                        8. Gupta RR et al: Patellar sleeve fractures in children: a case report and review of the literature. Am J Orthop. 35(7):336-8, 2006
                                        9. Tay GH et al: Indirect patella fractures following ACL reconstruction: a review. Acta Orthop. 77(3):494-500, 2006
                                        10. Chun KA, et al: Patellar fractures after total knee replacement. AJR Am J Roentgenol. 185(3):655-60, 2005
                                        11. Hunt DM et al: A review of sleeve fractures of the patella in children. Knee. 12(1):3-7, 2005
                                        12. Mayers LB et al: Acute transverse patellar fracture associated with weightlifting. Case report and literature review. Am J Sports Med. 29(2):232-3, 2001
                                        13. Carpenter JE et al: Fractures of the patella. Instr Course Lect. 43:97-108, 1994
                                        14. Sonin AH: Magnetic resonance imaging of the extensor mechanism. Magn Reson Imaging Clin N Am. 2(3):401-11, 1994
                                        15. Yu JS et al: MR imaging of injuries of the extensor mechanism of the knee. Radiographics. 14(3):541-51, 1994
                                        16. Salerno DJ: Fractures of the patella: closed and open repair versus patellectomy. J Am Osteopath Assoc. 74(6):538-41, 1975
                                        Related Anatomy
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                                        Related Differential Diagnoses
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                                        References
                                        Tables

                                        Tables

                                        KEY FACTS

                                        • Imaging

                                          • Top Differential Diagnoses

                                            • Pathology

                                              • Clinical Issues

                                                TERMINOLOGY

                                                • Synonyms

                                                  • Kneecap fracture
                                                • Definitions

                                                  • Patella fracture ± extensor mechanism disruption
                                                  • Extensor mechanism: Quadriceps tendon, patella, and patellar tendon

                                                IMAGING

                                                • General Features

                                                  • Radiographic Findings

                                                    • CT Findings

                                                      • MR Findings

                                                        • Nuclear Medicine Findings

                                                          • Imaging Recommendations

                                                            DIFFERENTIAL DIAGNOSIS

                                                              PATHOLOGY

                                                              • General Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Demographics

                                                                    • Natural History & Prognosis

                                                                      • Treatment

                                                                        DIAGNOSTIC CHECKLIST

                                                                        • Consider

                                                                          • Image Interpretation Pearls

                                                                            • Reporting Tips

                                                                              Selected References

                                                                              1. Della Rocca GJ: Displaced patella fractures. J Knee Surg. 26(5):293-9, 2013
                                                                              2. Lazaro LE et al: Effect of computerized tomography on classification and treatment plan for patellar fractures. J Orthop Trauma. 27(6):336-44, 2013
                                                                              3. Lee BJ et al: Adolescent patellar osteochondral fracture following patellar dislocation. Knee Surg Sports Traumatol Arthrosc. 21(8):1856-61, 2013
                                                                              4. Dy CJ et al: Meta-analysis of re-operation, nonunion, and infection after open reduction and internal fixation of patella fractures. J Trauma Acute Care Surg. 73(4):928-32, 2012
                                                                              5. Dupuis CS et al: Injuries and conditions of the extensor mechanism of the pediatric knee. Radiographics. 29(3):877-86, 2009
                                                                              6. Sheth NP et al: Periprosthetic patellar fractures. J Bone Joint Surg Am. 89(10):2285-96, 2007
                                                                              7. Drabicki RR et al: Stress fractures around the knee. Clin Sports Med. 25(1):105-15, ix, 2006
                                                                              8. Gupta RR et al: Patellar sleeve fractures in children: a case report and review of the literature. Am J Orthop. 35(7):336-8, 2006
                                                                              9. Tay GH et al: Indirect patella fractures following ACL reconstruction: a review. Acta Orthop. 77(3):494-500, 2006
                                                                              10. Chun KA, et al: Patellar fractures after total knee replacement. AJR Am J Roentgenol. 185(3):655-60, 2005
                                                                              11. Hunt DM et al: A review of sleeve fractures of the patella in children. Knee. 12(1):3-7, 2005
                                                                              12. Mayers LB et al: Acute transverse patellar fracture associated with weightlifting. Case report and literature review. Am J Sports Med. 29(2):232-3, 2001
                                                                              13. Carpenter JE et al: Fractures of the patella. Instr Course Lect. 43:97-108, 1994
                                                                              14. Sonin AH: Magnetic resonance imaging of the extensor mechanism. Magn Reson Imaging Clin N Am. 2(3):401-11, 1994
                                                                              15. Yu JS et al: MR imaging of injuries of the extensor mechanism of the knee. Radiographics. 14(3):541-51, 1994
                                                                              16. Salerno DJ: Fractures of the patella: closed and open repair versus patellectomy. J Am Osteopath Assoc. 74(6):538-41, 1975