Varus Stress Test for Lateral Collateral Ligament (LCL) Injuries and the Posterolateral Complex The Varus or Adduction Stress test is designed to stress the lateral collateral ligament. In the 0° position, the test stresses the whole Posterolateral complex (PLC) which is composed of the lateral (fibular) collateral ligament, the arcuate ligament, the popliteofibular ligament, posterior third of the lateral capsule and the fabellofibular ligament (when a fabella is present). In 20° flexion, the L