Peroneal Tendon Subluxation

The subluxation of the peroneal tendons is a rare but significant condition affecting the lower extremities. This disorder involves the displacement or slipping of the peroneal tendons, leading to pain, instability, and impaired ankle function. Understanding the mechanisms, diagnosis, and treatment options for this condition is essential for effective management and optimal patient outcomes.

Anatomy of the Peroneal Tendons

The peroneal tendons are part of the peroneal muscle group, which consists of the peroneus longus and peroneus brevis tendons. These tendons run along the outer side of the ankle, crossing behind the lateral malleolus (the bony bump on the outer part of the ankle), and inserting into the foot’s lateral aspect. Their primary function is to stabilize the ankle joint, aid in eversion of the foot, and provide support during gait.

Mechanism of Subluxation

Subluxation of the peroneal tendons typically occurs due to repetitive movements or trauma, leading to weakening or stretching of the surrounding structures that hold the tendons in place.

The subluxation can be due to:

  1. Ankle Inversion Sprains: Frequent ankle sprains, especially those involving inversion (rolling the ankle inward), can cause damage to the retinaculum, a thick band of connective tissue responsible for holding the tendons in place.
  2. Chronic Overuse: Repetitive activities involving ankle movement, such as running, jumping, or sports that demand rapid changes in direction, may lead to wear and tear of the peroneal tendons and surrounding structures.
  3. Anatomic Variations: Some individuals may have an anatomical predisposition to peroneal tendon subluxation due to variations in the shape or alignment of their ankle bones.


Diagnosing subluxation of the peroneal tendons begins with a comprehensive medical history and physical examination by a qualified healthcare professional. Common symptoms include pain on the outside of the ankle, swelling, instability, and a feeling of snapping or popping around the ankle during movement.

Imaging studies, such as X-rays and MRI scans, may be ordered to assess the bony structures and soft tissues in the ankle. MRI can be particularly helpful in visualizing the peroneal tendons and detecting any damage or displacement.


The treatment approach for subluxation of the peroneal tendons depends on the severity of the condition and its impact on the patient’s daily activities. Conservative management is often attempted initially typically involves:

  1. Rest and Immobilization: Temporary restriction of weight-bearing activities and the use of a brace or ankle support can help alleviate symptoms and provide the tendons with a chance to heal.
  2. Physical Therapy: Strengthening exercises for the ankle and lower leg muscles can improve stability and support the peroneal tendons.
  3. NSAIDs: Non-steroidal anti-inflammatory drugs (NSAIDs) may be prescribed to reduce pain and inflammation.
  4. Orthotics: Custom orthotic devices can help stabilize the foot and ankle, reducing excessive motion that may contribute to tendon irritation.

In cases where conservative measures do not provide relief or if there is significant tendon damage, surgical intervention may be necessary. Surgical procedures aim to repair the damaged structures, tighten the retinaculum, and stabilize the peroneal tendons.


Subluxation of the peroneal tendons is a challenging condition that can significantly impact an individual’s mobility and quality of life. Early diagnosis and appropriate treatment are essential to prevent further damage and improve long-term outcomes. Through a combination of conservative measures and, if required, surgical intervention, patients can expect to regain ankle stability, reduce pain, and resume their regular activities with confidence. Timely consultation with a healthcare professional is crucial for proper evaluation and management of this condition.

Forum Discussions:

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