Postero-lateral rotatory instability

SummaryThe three key components of the postero-lateral corner are the lateral collateral, the popliteal muscle-tendon unit and the popliteo-fibular ligament. Injuries to these structures are becoming increasingly recognized either in isolation or more commonly as part of a combined ligament injury.Careful assessment will avoid missing such injuries and MRI scanning is an aid to diagnosis. Treatment options range from conservative for mild isolated injuries, to surgical repair and/or reconstruction for combined and chronic injuries.