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Posteromedial Corner Injury
Donna G. Blankenbaker, MD, FACR; Kirkland W. Davis, MD, FACR
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KEY FACTS

  • Terminology

    • Imaging

      • Pathology

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations

              • Posteromedial corner (PMC)
              • Semimembranosus (SM)
              • Posterior oblique ligament (POL)
            • Synonyms

              • Semimembranosus corner injury
            • Definitions

              • PMC of knee extends from posterior aspect of medial collateral ligament (MCL) to medial edge of posterior cruciate ligament (PCL)
              • Prevents anteromedial rotatory instability of knee
              • Major components
                • SM muscle and tendon and its aponeurotic expansions
                • POL
                • Posteromedial aspect of medial meniscus
                • Posteromedial joint capsule

            IMAGING

            • General Features

              • Radiographic Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Staging, Grading, & Classification

                          • Gross Pathologic & Surgical Features

                            CLINICAL ISSUES

                            • Presentation

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Joshi A et al: Weave technique for reconstruction of medial collateral ligament and posterior oblique ligament: an anatomic approach using semitendinosus tendon. Arthrosc Tech. 8(11):e1417-23, 2019
                                      2. Dold AP et al: The posteromedial corner of the knee: anatomy, pathology, and management strategies. J Am Acad Orthop Surg. 25(11):752-61, 2017
                                      3. Lundquist RB et al: Posteromedial corner of the knee: the neglected corner. Radiographics. 35(4):1123-37, 2015
                                      4. Geiger D et al: Posterolateral and posteromedial corner injuries of the knee. Radiol Clin North Am. 51(3):413-32, 2013
                                      5. Bonasia DE et al: Treatment of medial and posteromedial knee instability: indications, techniques, and review of the results. Iowa Orthop J. 32:173-83, 2012
                                      6. Hubert MG et al: Surgical treatment of acute and chronic anterior and posterior cruciate ligament and medial-side injuries of the knee. Sports Med Arthrosc. 19(2):104-9, 2011
                                      7. Tibor LM et al: Management of medial-sided knee injuries, part 2: posteromedial corner. Am J Sports Med. 39(6):1332-40, 2011
                                      8. Levy BA et al: Controversies in the treatment of knee dislocations and multiligament reconstruction. J Am Acad Orthop Surg. 17(4):197-206, 2009
                                      9. Lind M et al: Anatomical reconstruction of the medial collateral ligament and posteromedial corner of the knee in patients with chronic medial collateral ligament instability. Am J Sports Med. 37(6):1116-22, 2009
                                      10. House CV et al: Posteromedial corner injuries of the knee. Clin Radiol. 62(6):539-46, 2007
                                      11. Fanelli GC et al: Surgical treatment of acute medial collateral ligament and posteromedial corner injuries of the knee. Sports Med Arthrosc. 14(2):78-83, 2006
                                      12. Kurzweil PR et al: Physical examination and imaging of the medial collateral ligament and posteromedial corner of the knee. Sports Med Arthrosc. 14(2):67-73, 2006
                                      13. Robinson JR et al: The posteromedial corner revisited. An anatomical description of the passive restraining structures of the medial aspect of the human knee. J Bone Joint Surg Br. 86(5):674-81, 2004
                                      14. Loredo R et al: Posteromedial corner of the knee: MR imaging with gross anatomic correlation. Skeletal Radiol. 28(6):305-11, 1999
                                      15. Yao L et al: Avulsion of the posteromedial tibial plateau by the semimembranosus tendon: diagnosis with MR imaging. Radiology. 172(2):513-4, 1989
                                      16. Hughston JC et al: The role of the posterior oblique ligament in repairs of acute medial (collateral) ligament tears of the knee. J Bone Joint Surg Am. 55(5):923-40, 1973
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Pathology

                                            • Clinical Issues

                                              • Diagnostic Checklist

                                                TERMINOLOGY

                                                • Abbreviations

                                                  • Posteromedial corner (PMC)
                                                  • Semimembranosus (SM)
                                                  • Posterior oblique ligament (POL)
                                                • Synonyms

                                                  • Semimembranosus corner injury
                                                • Definitions

                                                  • PMC of knee extends from posterior aspect of medial collateral ligament (MCL) to medial edge of posterior cruciate ligament (PCL)
                                                  • Prevents anteromedial rotatory instability of knee
                                                  • Major components
                                                    • SM muscle and tendon and its aponeurotic expansions
                                                    • POL
                                                    • Posteromedial aspect of medial meniscus
                                                    • Posteromedial joint capsule

                                                IMAGING

                                                • General Features

                                                  • Radiographic Findings

                                                    • MR Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Staging, Grading, & Classification

                                                              • Gross Pathologic & Surgical Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Natural History & Prognosis

                                                                    • Treatment

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Joshi A et al: Weave technique for reconstruction of medial collateral ligament and posterior oblique ligament: an anatomic approach using semitendinosus tendon. Arthrosc Tech. 8(11):e1417-23, 2019
                                                                          2. Dold AP et al: The posteromedial corner of the knee: anatomy, pathology, and management strategies. J Am Acad Orthop Surg. 25(11):752-61, 2017
                                                                          3. Lundquist RB et al: Posteromedial corner of the knee: the neglected corner. Radiographics. 35(4):1123-37, 2015
                                                                          4. Geiger D et al: Posterolateral and posteromedial corner injuries of the knee. Radiol Clin North Am. 51(3):413-32, 2013
                                                                          5. Bonasia DE et al: Treatment of medial and posteromedial knee instability: indications, techniques, and review of the results. Iowa Orthop J. 32:173-83, 2012
                                                                          6. Hubert MG et al: Surgical treatment of acute and chronic anterior and posterior cruciate ligament and medial-side injuries of the knee. Sports Med Arthrosc. 19(2):104-9, 2011
                                                                          7. Tibor LM et al: Management of medial-sided knee injuries, part 2: posteromedial corner. Am J Sports Med. 39(6):1332-40, 2011
                                                                          8. Levy BA et al: Controversies in the treatment of knee dislocations and multiligament reconstruction. J Am Acad Orthop Surg. 17(4):197-206, 2009
                                                                          9. Lind M et al: Anatomical reconstruction of the medial collateral ligament and posteromedial corner of the knee in patients with chronic medial collateral ligament instability. Am J Sports Med. 37(6):1116-22, 2009
                                                                          10. House CV et al: Posteromedial corner injuries of the knee. Clin Radiol. 62(6):539-46, 2007
                                                                          11. Fanelli GC et al: Surgical treatment of acute medial collateral ligament and posteromedial corner injuries of the knee. Sports Med Arthrosc. 14(2):78-83, 2006
                                                                          12. Kurzweil PR et al: Physical examination and imaging of the medial collateral ligament and posteromedial corner of the knee. Sports Med Arthrosc. 14(2):67-73, 2006
                                                                          13. Robinson JR et al: The posteromedial corner revisited. An anatomical description of the passive restraining structures of the medial aspect of the human knee. J Bone Joint Surg Br. 86(5):674-81, 2004
                                                                          14. Loredo R et al: Posteromedial corner of the knee: MR imaging with gross anatomic correlation. Skeletal Radiol. 28(6):305-11, 1999
                                                                          15. Yao L et al: Avulsion of the posteromedial tibial plateau by the semimembranosus tendon: diagnosis with MR imaging. Radiology. 172(2):513-4, 1989
                                                                          16. Hughston JC et al: The role of the posterior oblique ligament in repairs of acute medial (collateral) ligament tears of the knee. J Bone Joint Surg Am. 55(5):923-40, 1973