Peroneal tendons are two tendons that support two important foot muscles (peroneus brevis and peroneus longus) located on the outside of the calves. These two muscles allow you to roll to the outside of the foot while standing. Peroneal tendons are also called stirrup tendons because they help hold up the arch of the foot. The two muscles are held in place by a band of tissue, called the peroneal retinaculum. Injury to the retinaculum can cause this tissue to stretch or tear. When this happens, the peroneal tendons can dislocate from their groove on the back of the fibula. The tendons can be seen to roll over the outside of the fibula, which damages the tendons.

Skiing, football, basketball, and soccer are the most common sports activities leading to peroneal tendon dislocation. In some cases, ankle sprains have also caused this condition. Patients usually have to use crutches after these injuries in order to allow the retinaculum tissue to heal and the tendons to move back to their natural position on the fibula. A splint or compression bandage is sometimes applied to decrease swelling. Anti-inflammatory medications and ice are often part of the treatment.

Note: Please consult your physician before taking any medications.

Surgery may be required in some moderate to severe injuries. When the peroneal retinaculum is torn or severely stretched it becomes susceptible to dislocation.