Knee Dislocation

A very uncommon but also very important event.  There is an association with popliteal artery injury, be it dissection or transection/laceration.


  • anterior and posterior dislocations most common
    • in my experience, posterior dislocations much more common, but sample bias is substantial because this is a rare event
  • structural disruption of the knee joint including cruciate ligaments and collateral ligaments, often with associated meniscal tears.
    • on MRI, the knee is usually “trashed”.
    • reports end up being lengthy because of the extent of injury.
  • Fractures common.
  • associated popliteal artery injury estimated at 30%.