Ligament Tears – Medial Collateral Ligament (MCL)

The knee is the largest joint in the body and is vital to movement. The stability of the knee mostly depends on the ligaments and muscles around it. Therefore, injuries to knee ligaments are common. In 2006, more than 12 million people visited orthopaedic surgeons because of knee problems.

Two sets of ligaments in the knee give it stability: the cruciate ligaments and the collateral ligaments.

The collateral ligaments are located on the inner (medial) side of the knee joint and the outer (lateral) side of the knee joint. The medial collateral ligament (MCL) connects the thighbone to the shinbone, and provides stability to the inner side of the knee. The lateral collateral ligament (LCL) connects the thighbone to the other bone in the lower portion of the leg (fibula) and stabilizes the outer side.

Collateral Ligament Injuries

Injuries to the MCL are usually caused by contact on the outside of the knee and are accompanied by sharp pain on the