Patterns of bone contusion in knee injury

Dr Henry Knipe et al.

Pattern of bone contusion in knee injuries can give clues for the mechanism and associated injuries. 

Radiographic features

Five classic bone contusion patterns have been described 1-4:

  • pivot-shift injury
  • dashboard injury
    • anterior force to tibia in a flexed knee (e.g. knees against dashboard in motor vehicle collision, or fall onto flexed knee)
    • contusion pattern: anterior tibia +/- posterior patellar
    • associated with posterior cruciate ligament (PCL) tear
  • clip injury
    • valgus stress to flexed knee
    • contusion pattern: lateral femoral condyle and lateral tibial plateau +/- medial femoral condyle from medial collateral ligament (MCL) avulsive stress
    • associated with MCL injuries
  • hyperextension injury
    • direct force to anterior tibia with foot planted
    • contusion pattern: "kissing contusions" of anterior tibial plateau and anterior femoral condyle
    • associated with ACL, PCL, meniscal injuries, and in severe cases knee dislocation
  • lateral patellar dislocation
    • twisting injury to flexed knee
    • anterolateral lateral femoral condyle and inferomedial patella
    • associated with medial patellar retinaculum +/- medial patellofemoral ligament injury +/- medial patellotibial ligament injuries
Knee pathology

The knee is a complex synovial joint that can be affected by a range of pathologies:

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Article Information

rID: 43268
Section: Gamuts
Synonyms or Alternate Spellings:
  • Pattern of bone contusion in knee injuries

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Cases and Figures

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    Case 2: lateral patellar dislocation
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