To understand peroneal tendon injuries, it’s important to first understand what the peroneal tendons do. A tendon is a band of tissue that connects a muscle to a bone to provide movement at a joint. The two peroneal tendons in the foot run side by side behind the outer ankle bone. One peroneal tendon (Peroneus Brevis) attaches to the outer part of the midfoot, while the other tendon (Peroneus Longus) runs under the foot and attaches near the inside of the arch. The main function of the peroneal tendons is to stabilize the foot and ankle and protect them from sprains.
Peroneal tendon injuries may be acute (occurring suddenly) or chronic (developing over a period of time). They most commonly occur in individuals who participate in sports that involve repetitive ankle motion. In addition, people with higher arches are at risk for developing peroneal tendon injuries. Basic types of peroneal tendon injuries are tendonitis, tears and subluxation.
Tendinitis is an inflammation of one or both tendons. The inflammation is caused by activities involving repetitive use of the tendon, overuse of the tendon or trauma (such as an ankle sprain). Symptoms of tendonitis include:
Acute tears are caused by repetitive activity or trauma. Immediate symptoms of acute tears include:
As time goes on, these tears may lead to a change in the shape of the foot in which the arch may become higher.
Degenerative tears (Tendinosis) are usually due to overuse and occur over long periods of time, often years. In degenerative tears, the tendon is like taffy that has been overstretched until it becomes thin and eventually frays. Having high arches also puts you at risk for developing a degenerative tear. The symptoms of degenerative tears may include:
Subluxation means one or both tendons have slipped out of their normal position. In some cases, subluxation is due to a condition in which a person is born with a variation in the shape of the bone or muscle. In other cases, subluxation occurs following trauma, such as an ankle sprain. Damage or injury to the tissues that stabilize the tendons (retinaculum) can lead to chronic tendon subluxation. The symptoms of subluxation may include:
Early treatment of a subluxation is critical since a tendon that continues to sublux (move out of position) is more likely to tear or rupture. Therefore, if you feel the characteristic snapping, see a foot and ankle surgeon immediately.
Because peroneal tendon injuries are sometimes misdiagnosed and may worsen without proper treatment, prompt evaluation by a foot and ankle surgeon is advised. To diagnose a peroneal tendon injury, the surgeon will examine the foot and look for pain, instability, swelling, warmth and weakness on the outer side of the ankle. In addition, an x-ray or other advanced imaging studies may be needed to fully evaluate the injury. The foot and ankle surgeon will also look for signs of an ankle sprain and other related injuries that sometimes accompany a peroneal tendon injury. Proper diagnosis is important because prolonged discomfort after a simple sprain may be a sign of additional problems.
Treatment depends on the type of peroneal tendon injury. Options include:
In some cases, surgery may be needed to repair the tendon or tendons and perhaps the supporting structures of the foot. Your doctor will determine the most appropriate procedure for the patient’s condition and lifestyle. After surgery, physical therapy is an important part of rehabilitation.
If you are suffering from pain along the outside of the ankle, do not hesitate to call us (949) 833-3406 or request an appointment online. Our doctors are well-versed in this condition and can develop an effective treatment course to get you back in action as soon as possible.