Medial collateral ligament (MCL) of the knee

Medial collateral ligament (MCL) of the knee: The knee joint is surrounded by a joint capsule with ligaments strapping the inside and outside of the joint (collateral ligaments) as well as crossing within the joint (cruciate ligaments). These ligaments provide stability and strength to the knee joint.

The medial collateral ligament of the knee is on the inner side of the joint, as indicated here: