Painful Clicking and Popping at the Lateral Ankle: Superior Peroneal Retinaculum Damage and Its Impact on Tendon Health

Damage to the superior peroneal retinaculum can cause significant problems in the ankle, especially related to the stability and function of the peroneal tendons. These tendons run behind the fibula bone and play a crucial role in foot movement and balance. When the retinaculum is injured, it can lead to tendinous dislocation, causing symptoms such as clicking and popping. Over time, this instability may damage the tendons themselves, potentially leading to tears. This article explores the causes, symptoms, and treatment options for superior peroneal retinaculum damage, helping you understand this condition and how to manage it effectively.

Anatomy of the superior peroneal retinaculum and peroneal tendons

What Is the Superior Peroneal Retinaculum?

The superior peroneal retinaculum is a band of fibrous tissue located on the outside of the ankle. It holds the peroneal tendons in place as they pass behind the fibula bone. These tendons connect muscles in the lower leg to the foot and contribute to foot eversion (turning the sole outward) and to stabilization during walking or running.

When the retinaculum is intact, it prevents the tendons from slipping out of their groove behind the fibula. Damage to this structure can cause the tendons to dislocate or sublux (partially dislocate), leading to mechanical symptoms and tendon injury.

Causes of Superior Peroneal Retinaculum Damage

Several factors can cause damage to the superior peroneal retinaculum, including:

• Trauma or Injury: A sudden ankle injury, such as a forceful ankle sprain or direct blow to the outer ankle, can tear or stretch the retinaculum.

• Repetitive Stress: Activities involving repeated ankle movements, such as running, jumping, or sports with rapid directional changes, can gradually weaken the retinaculum.

• Anatomical Variations: Some individuals have a shallow groove behind the fibula or a naturally loose retinaculum, which increases the risk of tendon dislocation.

• Previous Ankle Surgery or Fractures: Scar tissue or altered anatomy after surgery or fractures may affect the retinaculum’s function.

• Chronic Instability: Repeated ankle sprains can weaken the retinaculum over time.

  
  

Symptoms of Superior Peroneal Retinaculum Damage

The main symptoms arise from the instability of the peroneal tendons and include:

• Clicking or Popping Sensation: Patients often report a snapping sound on the outside of the ankle during foot movement.

• Pain and Swelling: Dislocation or irritation of the tendons can cause localized pain and swelling around the fibula.

• Tenderness: The area behind the fibula may be tender to touch.

• Instability or Weakness: The ankle may feel unstable, particularly during activities requiring side-to-side movement.

• Visible Tendon Displacement: In some cases, the tendons may visibly move out of place during ankle motion.

• Tendon Damage: Over time, repeated dislocation can cause tendon fraying or tearing, worsening symptoms and function.

Image showing crushing of the peroneus brevis between the peroneus longus and the fibula during a lateral ankle sprain. This can occur if the peroneal retinaculum is intact during the injury.

Image showing dislocation of the peroneal tendons around the fibula, creating a "popping" sensation.

Diagnosing Superior Peroneal Retinaculum Injury

Diagnosis usually involves a combination of clinical examination and imaging:

• Physical Exam: A physician will assess for tenderness and swelling and test ankle stability. They may try to reproduce the tendon dislocation by moving the foot.

• X-rays: These help rule out fractures or bone abnormalities.

• Ultrasound: Dynamic ultrasound can visualize tendon movement and detect dislocation during ankle motion.

• MRI: Provides detailed images of soft tissues, showing retinaculum tears, tendon damage, or inflammation.

  
  

Early diagnosis is important to prevent tendon damage and chronic instability.

Conservative Treatment Options

Many cases of superior peroneal retinaculum damage respond well to non-surgical treatment, especially if diagnosed early:

• Rest and Activity Modification: Avoid activities that cause pain or dislocation of the tendons.

• Immobilization: Wearing a cast or walking boot for several weeks can facilitate healing of the retinaculum.

• Physical Therapy: Focuses on strengthening the muscles around the ankle, improving balance, and restoring normal tendon function.

• Anti-inflammatory Medications: Help reduce pain and swelling.

• Bracing or Taping: Supports the ankle during activity to prevent tendon displacement.

  
  

Conservative treatment requires patience and adherence to avoid further injury.

When Surgery Becomes Necessary

Surgery is indicated when conservative measures fail or when there is significant tendon damage. Indications for surgery include:

• Persistent tendon dislocation causing pain and instability.

• Tendon tears or fraying confirmed by imaging.

• Chronic retinaculum tears that do not heal on their own.

  
  

Surgical Techniques

The goal of surgery is to restore the retinaculum’s function and stabilize the peroneal tendons:

• Retinaculum Repair or Reconstruction: The torn retinaculum is repaired or reinforced using sutures or grafts.

• Deepening the Fibular Groove: Sometimes the groove behind the fibula is shallow; deepening it helps keep tendons in place.

• Tendon Repair: If tendons are torn, they are repaired or cleaned up.

• Postoperative Care: Includes immobilization followed by physical therapy to regain strength and mobility.

  
  

Surgical outcomes are generally good, with most patients returning to normal activities.

Preventing Superior Peroneal Retinaculum Damage

Prevention focuses on protecting the ankle and maintaining tendon health:

• Proper Footwear: Supportive shoes reduce ankle strain.

• Strength Training: Exercises targeting ankle muscles improve stability.

• Avoid Overuse: Gradually increase activity levels to reduce the risk of repetitive strain.

• Ankle Bracing: Use during high-risk sports or activities.

• Early Treatment of Ankle Injuries: Prompt care for sprains reduces the risk of chronic problems.

  
  

Summary

Damage to the superior peroneal retinaculum disrupts the stability of the peroneal tendons, leading to dislocation, clicking, and potential tendon injury. Recognizing symptoms early and seeking appropriate care can prevent long-term damage. Treatment ranges from rest and physical therapy to surgery in severe cases. Maintaining ankle strength and avoiding repetitive stress helps protect this important structure and supports overall foot health.

If you have been experiencing lateral ankle clicking or pain, call us at 832-743-0508 to schedule an appointment. Or visit us at www.SelectFAS.com to schedule online.