- Like the ACL, the MCL plays large role in stabilizing the knee joint. It runs down side of the knee joint, on the inside part of the leg, and connects the femur with the tibia. Most often, these tears occur due to rough contact that pushes the outside of the knee inwards. Pain will be felt on the inside of the knee and there will be sensations of the knee "giving way". Swelling is also a common reaction.
Treatment does not always require surgery, but it can. Physical therapy will concentrate on strengthening the joint as well as muscles supporting it to increase overall strength and motion.