Which test is used to evaluate for a Lateral Collateral Ligament (LCL) injury?

The Adduction (Varus) stress test is specifically designed to assess injuries to the lateral collateral ligament (LCL) of the knee. During this test, the examiner applies a varus force to the knee while stabilizing the ankle, effectively stressing the LCL. A positive test occurs when there is excessive opening of the lateral joint line or pain, indicating an injury or laxity in the ligament.

By contrast, the other tests listed serve different purposes: the Abduction (Valgus) stress test evaluates the medial collateral ligament (MCL), while the Posterior drawer test assesses the posterior cruciate ligament (PCL). McMurray's test is used primarily to detect meniscal tears, not ligament injuries. Thus, the Adduction (Varus) stress test clearly stands out as the appropriate choice for evaluating an LCL injury.