Other Ligament Injury
Medial Collateral Ligament (MCL) tears are often caused by a direct blow to the outside of the knee (valgus force) that causes the knee to point inwards, put the LCL on slack, stretches the MCL, and consequently injures the MCL. This and the ACL are the most common ligaments injured, as blows to the outside of the leg are more common than blows to the inside.
Lateral Collateral Ligament (LCL) tears are caused by a direct force to the inside of the knee. Both LCL and PCL injuries result in localized pain and effusion.
The Posterior Cruciate Ligament (PCL) is torn in a “dashboard injury”, which is a blow to the anterior knee that occurs when the knee is bent. It often occurs in either sports or automobile accidents.