You have to divide it into the acute or the immediate injury and then the chronic. Acute injury, they get swelling, pain, and stiffness that usually resolve over time and then they begin to get their motion back. If it’s a severe tear of the PCL what we call a grade three, a complete tear then they’ll feel instability of the knee. They will actually feel the tibia sliding back and forth. So, that would be one of the symptoms. Most isolated PCL injured knees that means just the PCL is torn nothing else are grade one or two injuries. And they don’t have that many symptoms with them. If they undergo physical therapy they usually do not need anything else done.