Peroneal Tendon Repair Surgery: Fixing Tears and Splits of the Ankle’s Lateral Tendons

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Peroneal Tendon Anatomy and Injury Patterns

Two peroneal tendons — the peroneus brevis and peroneus longus — run behind the lateral malleolus (outer ankle bone) in a shared groove before diverging to their separate insertions. The brevis inserts on the fifth metatarsal base, while the longus crosses under the foot to the first metatarsal.

The peroneus brevis is more commonly injured because it lies directly against the fibula and is compressed between the longus and bone. Longitudinal splits in the brevis tendon develop from chronic compression, repetitive ankle sprains, or an anatomically shallow fibular groove.

In our clinic, we frequently find peroneal tendon tears during evaluation of chronic lateral ankle pain that has not responded to standard sprain rehabilitation. Approximately 25-40% of patients with recurrent ankle sprains have concurrent peroneal tendon pathology.

When Surgery Becomes Necessary

Conservative treatment including bracing, physical therapy, and activity modification is appropriate for acute tendinitis and early tendon changes. However, established tears, longitudinal splits, and subluxation typically require surgical repair because tendons have poor inherent healing capacity.

Surgery is indicated for persistent lateral ankle pain despite 3-6 months of conservative care, documented tendon tears on MRI or ultrasound, mechanical symptoms like snapping or popping, and chronic ankle instability caused by peroneal weakness.

The specific surgical procedure depends on the type and extent of tendon damage, which is fully assessed during surgery when the tendons are directly visualized.

Surgical Repair Techniques

Tubularization repairs longitudinal splits in the peroneus brevis by debriding the damaged tissue and suturing the remaining healthy tendon edges together into a tube shape. This works well when less than 50% of the tendon cross-section is damaged.

Side-to-side tenodesis is used when the brevis tear is extensive (more than 50% of cross-section) and the remaining tendon is not strong enough for tubularization. The damaged brevis is sutured to the adjacent healthy longus tendon, which takes over its function.

Complete tendon transfer — typically harvesting the FDL or FHL tendon to replace an irreparably damaged peroneus brevis — is reserved for the most severe cases where neither repair nor tenodesis is feasible.

Groove-deepening is frequently performed as a concurrent procedure to prevent future subluxation. The fibular groove is deepened by elevating a bone flap and creating more space for the tendons to sit securely behind the lateral malleolus.

Recovery After Peroneal Tendon Surgery

Weeks 0-2: Non-weight-bearing in a splint with elevation and ice. Gentle ankle range of motion may begin at 10-14 days depending on the repair.

Weeks 2-6: Transition to a walking boot with progressive weight-bearing. Physical therapy begins with gentle ankle mobility and early strengthening.

Weeks 6-12: Transition to supportive shoes with an ankle brace. Physical therapy progresses to peroneal-specific strengthening, proprioceptive training, and functional exercises.

Months 3-6: Return to full activities including sports. An ankle brace is recommended during high-risk activities for the first year. Doctor Hoy’s gel manages residual inflammation during the return-to-activity phase.

In-Office Treatment at Balance Foot & Ankle

Dr. Tom Biernacki performs peroneal tendon repair, groove-deepening, and tendon transfer procedures with extensive experience in lateral ankle reconstruction. Our in-office ultrasound provides real-time dynamic assessment of peroneal tendon pathology.

Same-day appointments available. Call (810) 206-1402 or visit michiganfootdoctors.com/new-patient-information/ to schedule.

The Most Common Mistake We See

The most common mistake is treating chronic lateral ankle pain as a recurrent sprain when it is actually a peroneal tendon tear. Sprains and peroneal tears have overlapping symptoms, but the treatment is fundamentally different. If lateral ankle pain persists beyond 8 weeks of proper rehabilitation, peroneal imaging is essential.

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In-Office Treatment at Balance Foot & Ankle

Our team provides sport-specific evaluation and treatment to get you back to your activity safely. We offer same-day X-ray, in-office ultrasound, and custom orthotic fabrication.

Same-day appointments available. Call (810) 206-1402 or book online.

Frequently Asked Questions

What causes peroneal tendon tears?

Peroneal tears result from chronic ankle sprains, repetitive overuse, a shallow fibular groove, and acute inversion injuries. The peroneus brevis is most commonly affected because it is compressed between the longus tendon and the fibula bone.

How long is peroneal tendon surgery recovery?

Recovery involves 2 weeks non-weight-bearing, 4 weeks progressive weight-bearing in a boot, and transition to shoes with a brace at 6 weeks. Return to full activity including sports takes 3-6 months with structured rehabilitation.

Can peroneal tendon tears heal without surgery?

Mild tendinitis and early tendon changes can improve with conservative treatment. Established tears and longitudinal splits typically do not heal on their own because tendons have limited blood supply and healing capacity in this location.

Does insurance cover peroneal tendon surgery?

Yes, peroneal tendon repair is covered by insurance as a medically necessary surgical procedure when conservative treatment has failed. Pre-operative evaluation, surgery, and rehabilitation are all covered.

The Bottom Line

Peroneal tendon tears are a frequently missed cause of chronic lateral ankle pain. If your outer ankle has not improved despite months of rehabilitation for recurrent sprains, the tendons behind your ankle may be the real problem.

Differential Diagnosis: What Else Could It Be?

Not every case of peroneal tendonitis is straightforward. In our clinic we routinely rule out three look-alike conditions before confirming the diagnosis. If your symptoms don’t match the classic presentation, one of these may explain the pain — which is why physical exam matters more than self-diagnosis.

Condition	How It Differs
Lateral ankle sprain	Acute inversion mechanism, bruising along anterior talofibular ligament, pain with anterior drawer.
5th metatarsal base stress fracture	Point tenderness at 5th metatarsal base, pain with weight-bearing, fracture line on imaging.
Sinus tarsi syndrome	Deep ache in the sinus tarsi, pain reproduced with lateral palpation just anterior to the lateral malleolus.

Red Flags — When to See a Podiatrist Now

In Our Clinic: What We See

Sources

1. Dombek MF, et al. Peroneal tendon tears: a retrospective review. J Foot Ankle Surg. 2003;42(5):250-258.
2. van Dijk PAD, et al. Peroneal tendon disorders: a systematic review. J Foot Ankle Surg. 2025;64(1):22-35.

Sesamoid Injury Treatment in Michigan

Sesamoid injuries — including sesamoiditis, stress fractures, and avascular necrosis — cause persistent pain under the big toe that affects walking and push-off. Our podiatrists at Balance Foot & Ankle provide specialized sesamoid diagnosis and treatment at our Howell and Bloomfield Hills offices.

Learn About Our Forefoot Treatment Options | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Cohen BE. Hallux sesamoid disorders. Foot and Ankle Clinics. 2009;14(1):91-104.
2. Richardson EG. Hallucal sesamoid pain: causes and surgical treatment. Journal of the American Academy of Orthopaedic Surgeons. 1999;7(4):270-278.
3. Bichara DA, et al. Sesamoidectomy for hallux sesamoid fractures. Foot & Ankle International. 2012;33(9):704-706.

Dr. Tom’s Top 3 — The Premium Foot Pain Stack (2026)

If you only buy three things for foot pain, get these. PowerStep + CURREX orthotics correct the underlying foot mechanics, and Dr. Hoy’s pain gel delivers fast topical relief. This is the exact stack Dr. Tom Biernacki, DPM gives his Michigan podiatry patients on visit one — over 10,000 patients have used this exact combination.