Irreducible Posterolateral Dislocation of the Knee Joint with Lateral Dislocation of the Patella: A Report of Two Cases

Reduction of the knee is impossible if the medial femoral condyle is caught in the medial soft tissue while posterolateral dislocation of the knee happens. Irreducible posterolateral dislocation with buttonholing of the medial femoral condyle through the torn vastus medialis muscle has rarely been reported. Furthermore, such a case associated with patella lateral dislocation has very seldom been reported. We report here on 2 such cases that were treated with open reduction.