Because the PCL is located inside the knee joint, which may be very swollen and painful, it can be difficult to diagnose a PCL tear solely by physical examination. That said, your doctor will do a posterior drawer test, where he or she pushes the shinbone or tibia back while the knee is bent 90 degrees. If the tibia moves more than five millimeters backward, it is likely that the PCL has been torn. Your doctor may perform other maneuvers to test for PCL insufficiency as well.
In addition, there are a number of tests your doctor may use to more closely examine your injury, including:
Reviewed by health care specialists at UCSF Medical Center.