The peroneal tendons are two tendons that lie immediately behind the outside bone of the ankle (the fibula). These two tendons are responsible for moving the foot outwards in a direction called eversion.
They are important tendons because they balance the ankle and the back of the foot and prevent the foot from turning inwards repetitively. They are slightly weaker than the muscles and tendons on the inside of the ankle and are prone to injury as the ankle turns, rolls or becomes sprained.
Tears of peroneal tendons do occur. One or both of the tendons can be torn. Occasionally the peroneal tendons can be injured in either a fall or an athletic injury. They pop out of the supporting ligaments that hold them in place and dislocate.
Once this occurs, recurrent dislocation and tearing of the peroneal tendons is inevitable. If the peroneal tendons dislocate acutely in an injury, they need to be repaired to prevent future tearing of the tendons.
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