Ruptured Anterior Cruciate Ligament

The Anterior Crusciate Ligament (ACL) is located in the middle of the knee and works in unison with the Posterior Crusciate Ligament (PCL) to keep the femur and tibia in place. A ruptured ACL is caused by extreme stretching or tearing of the ligament and can be due to contact and non-contact injuries. Early symptoms include a “pop” like sound at moment of injury, followed by severe pain and gradual knee swelling within six hours of injury.