Posterolateral Corner Injuries

Posterolateral corner (PLC) injuries refer to a complex set of injuries involving the structures on the back and outer side of the knee joint. These structures include the lateral collateral ligament (LCL), popliteofibular ligament (PFL), biceps femoris tendon, and the structures that connect the femur (thigh bone) and tibia (shin bone) in the back and outer side of the knee joint.

What are the causes of posterolateral corner injuries?

PLC injuries typically result from a sudden, traumatic force applied to the knee, such as a sports injury or a car accident. Symptoms may include pain, swelling, instability, and difficulty bearing weight on the affected leg.

How are posterolateral corner diagnosed?

Diagnosing posterolateral corner (PLC) injuries typically involves a combination of a physical examination, imaging tests, and sometimes an arthroscopy.

During the physical exam, a healthcare professional will examine the knee for signs of injury, such as swelling, tenderness, and instability. They may also perform specific tests to evaluate the function of the structures in the posterolateral corner.

Imaging tests, such as X-rays, MRI, or CT scans, may be ordered to help confirm the diagnosis and assess the extent of the injury.

In some cases, an arthroscopy may be necessary to view the inside of the knee joint and confirm the diagnosis. Arthroscopy is a minimally invasive surgical procedure in which a tiny camera and instruments are inserted through small incisions in the knee to evaluate and treat the injury.

It’s important to seek prompt medical attention if you suspect a PLC injury, as early diagnosis and treatment can lead to better outcomes. A healthcare professional can determine the best course of treatment for your specific injury.