Extreme hyperextension injury of the knee
Water skiing and ski "dug in" causing extreme knee extension. Now severe pain and instability
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Complete rupture of PCL at its femoral attachment, complete rupture of semimembranosus tendon with retraction at its tibial insertion (other pes anserine tendons are intact), partial disruption to biceps femoris tendon at its fibular insertion, marked bone marrow oedema (bone brusing) along the anterior tibial plateaux due to impaction with the femoral condyles (as well as a minor depressed lateral tibial plateau fracture laterally) and marked oedema in the soft tissues of the popliteal fossa. Nore incidental bi or tripartite patella.