what is a plc injury
PLC Knee Injury. The Posterolateral Complex (PLC) refers to a group of ligaments and tendons that run on the outside of the knee. The PLC is composed of the fibular collateral ligament (FCL), the popliteofibular ligament (PFL), and the tendon of the popliteus muscle. Together these three structures provide stability to the knee with side to side motion and during rotational movements.