Medial collateral ligament
The medial collateral ligament of the knee is one of the ligaments that support the joint, and limit their movement from side to side. It runs from the inside of the bottom of the thighbone to the inside of the top of the shin bone, ie joins the femur to the tibia. The main injury affecting this area are the medial collateral ligament sprain and rupture of the medial collateral ligament usually caused by trauma to the knee when it is in a flexed position or external rotation and valgus (outward deflection by congenital) malformation. Another complication affecting this ligament is the Pellegrini-Stieda syndrome, which is the ossification of the medial collateral ligament of the knee.