What structures are present at the posterolateral corner of the knee

What structures are present at the posterolateral corner of the knee, and why are they important?

The posterolateral corner structures stabilize the knee from varus and rotatory stresses. They consist of the LCL complex, the popliteus muscle and tendon, the lateral head of the gastrocnemius tendon, as well as the arcuate, fabellofibular, and popliteofibular ligaments.

Posterolateral corner injury is often associated with cruciate ligament tears. Failure of prompt treatment often leads to a poor outcome with early secondary osteoarthritis.

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