Selective Ankle Denervation for Chronic Ankle Pain: A Clinical Review

By Dr. Chris Lakhiani, MD, FACS · September 2026

1. The Clinical Problem

1.1 The persistent-pain subpopulation

Chronic ankle pain following inversion sprain, malleolar fracture, arthroscopy, or arthrodesis is common and often incompletely addressed. Depending on injury severity and follow-up interval, a substantial minority of patients report persistent pain, functional limitation, and impaired return to activity months to years after the index event.^4,5 Within this population is a distinct subgroup whose imaging is normal or minimally abnormal, whose structural workup identifies no correctable lesion, and whose pain is nonetheless anatomically consistent, block-responsive, and clinically neuropathic in character.

1.2 The under-recognized neuropathic contribution

Ankle-capsule innervation is served by terminal sensory branches of the deep peroneal, superficial peroneal, sural, saphenous, and tibial nerves.^6,7 Stretch, contusion, entrapment in scar, or direct incisional injury to any of these branches during a sprain, fracture, hardware placement, or arthroscopy can produce persistent neuropathic pain even after the joint itself has structurally healed. Because these terminal branches are small, largely sensory, and not readily seen on cross-sectional imaging or standard electrodiagnostics, the neuropathic contribution is often overlooked in favor of a residual-structural explanation.

1.3 The dilemma when structural options are exhausted

The surgeon evaluating chronic ankle pain often faces the situation in which ankle arthrodesis or total ankle arthroplasty is either not indicated (because the joint is structurally acceptable) or has already been performed without adequate pain relief. In these patients, further structural surgery is unlikely to help, and non-operative management has already been optimized. Selective denervation — targeted interruption of the sensory branches supplying the painful region, without disturbing the joint itself — occupies the specific therapeutic niche between "no structural target" and "no acceptable further structural intervention."^1,2 For the broader question of when persistent pain reflects central rather than peripheral drivers, see Diagnosing Centralized Pain After Peripheral Nerve Injury: The 2026 Raasveld-Eberlin Framework.

2. Sensory Neuroanatomy of the Ankle Joint

Five nerves supply the ankle capsule, adjacent ligaments, and overlying cutaneous territory. A working knowledge of their anatomy and reliable bedside landmarks is prerequisite to both accurate diagnostic blocks and safe selective denervation.^6,7,11

Of particular relevance to sinus tarsi denervation is the interosseous branch of the deep peroneal nerve and its terminal articular branches to the sinus tarsi, which Dellon has described as the anatomic target for the treatment of sinus tarsi syndrome.^2,6 These small articular branches lie deep to the extensor retinaculum, run between EHL and EDL just proximal to the ankle where all three fascicles to the ankle and foot remain grouped, and can be reliably identified through a small dorsal incision. Preservation of the main motor and cutaneous branches during selective denervation is anatomically feasible because the articular branches diverge from the parent nerve at a predictable location proximal to the retinaculum.

3. Patient Selection Framework

Appropriate patient selection is the single most important determinant of outcome in selective ankle denervation. A structured selection framework operationalizes the criteria used across the published series.^1,2,3

3.1 Chronicity

Pain persisting ≥3 months beyond expected healing timelines, and refractory to appropriate conservative management (bracing, physical therapy, NSAIDs, activity modification, targeted injections where indicated).

3.2 Anatomic consistency

The pain distribution and physical examination localize to the territory of one or more identifiable sensory branches. Diffuse, non-anatomic, or migratory pain is a warning sign of a dominant central component or an alternative diagnosis.

3.3 Positive diagnostic nerve block

The single most operationally decisive selection criterion. A well-placed, anatomically appropriate diagnostic block of the suspected target nerve(s) — deep peroneal for anterior/sinus tarsi pain, sural for lateral pain, saphenous for medial pain, superficial peroneal for dorsolateral pain — should produce meaningful relief of the presenting pain. Most series use a threshold of ≥50% pain reduction; some centers use ≥70% for stricter selection.^1,2,9 Ultrasound guidance improves anatomic accuracy and reduces false-negative blocks. A negative or minimally responsive block is a strong argument against proceeding with denervation on that target.

3.4 Screen for central sensitization

The Raasveld-Eberlin 2026 framework provides evidence-based diagnostic criteria for centralized pain in the peripheral nerve injury population.⁸ The five criteria are: (i) documented peripheral nervous system injury or compression; (ii) neuropathic pain ≥3 months; (iii) hyperalgesia, allodynia, or hypersensitivity extending beyond the primary zone of injury; (iv) associated mood or cognitive disturbances; and (v) limited response to peripheral nerve blocks (<50% pain reduction). Patients with a dominant central component and a <50% block response are unlikely to derive durable benefit from denervation alone; the appropriate pathway is central-focused care. For full discussion, see Diagnosing Centralized Pain After Peripheral Nerve Injury.

3.5 Rule out active structural pathology

Selective denervation is not appropriate as a substitute for correction of an unstable joint or unaddressed structural failure. Screen for: unstable ankle fusion hardware, missed occult fracture, active infection, inflammatory arthritis flare, and untreated ligamentous instability requiring reconstruction. In these settings, structural correction should precede any consideration of denervation.

4. Surgical Technique

The technique described below reflects the approach developed by Dellon and refined in subsequent series.^1,2,10

4.1 Setting and anesthesia

Outpatient procedure. General or regional anesthesia; tourniquet control at the thigh or calf as appropriate. Positioning is supine, with the operative extremity accessible for the specific targets planned.

4.2 Incisions and dissection

Small, anatomically targeted incisions are placed directly over the target nerve(s):

• Anterior ankle incision between EHL and EDL, deep to the extensor retinaculum, for the deep peroneal nerve and its articular branches to the anterior ankle and sinus tarsi.
• Anterolateral leg incision distal to where the superficial peroneal nerve pierces the fascia, for superficial peroneal denervation.
• Posterolateral incision behind the lateral malleolus for the sural nerve.
• Medial ankle incision above the medial malleolus over the course of the great saphenous vein, for the saphenous nerve.

4.3 Identification and preservation of motor branches

Because the deep peroneal nerve carries motor fibers to the extensor digitorum brevis and ankle dorsiflexors, the point of division is chosen proximally where only the articular fascicles are present, or distally at a level that spares the motor branches. Loupe magnification is standard. Intraoperative nerve stimulation may be used to confirm the absence of motor response in the branch to be transected.

4.4 Nerve transection with proximal implantation

The defining maneuver of contemporary selective denervation. Once the target sensory branch is identified and confirmed, it is sharply transected and the proximal end is buried into an intramuscular environment under gentle tension, using an interference-fit technique or a simple pocket suture.^1,10 The purpose is to prevent painful neuroma formation at the proximal stump by giving regenerating axons a receptive muscular bed. Common recipient muscles for the ankle nerves include the anterior compartment muscles (for the deep peroneal), the peroneal muscles (for the superficial peroneal), the gastrocnemius or peroneal muscles (for the sural), and the medial gastrocnemius or an adjacent recipient (for the saphenous).

4.5 Adjunctive techniques for symptomatic or larger terminal neuromas

For larger terminal neuromas or where the transected nerve is a mixed-caliber trunk, targeted muscle reinnervation (TMR) — coaptation of the proximal nerve to a motor branch of an expendable muscle — or a regenerative peripheral nerve interface (RPNI) — implantation of the proximal end into a free non-vascularized muscle graft — may be preferred over simple muscle implantation.^12,13 These techniques have accumulating evidence in the neuroma-prevention and treatment literature.

4.6 Closure and postoperative course

Standard layered wound closure. A walking boot is applied. Immediate weight-bearing as tolerated is typical for isolated denervation without a concomitant structural procedure. Sutures are removed at 10–14 days. Return to unrestricted activity is generally at 4–6 weeks, guided by wound healing and pain resolution.

5. Principal Indications and Outcomes

5.1 Sinus tarsi syndrome

Sinus tarsi syndrome — deep, poorly localized pain over the lateral hindfoot in the region of the sinus tarsi, often after inversion injury — has emerged as one of the most reliable indications for selective denervation, targeting the terminal articular branches of the deep peroneal nerve to the sinus tarsi.² In the Dellon series and follow-up data, approximately 77% of appropriately selected patients were completely pain-free at ≥6 months, 15% reported partial relief, and 8% had no meaningful relief.² Selection is predicated on failure of conservative care, anatomically consistent pain, and a positive diagnostic block of the deep peroneal nerve.

5.2 Post-traumatic ankle pain

After inversion sprain or malleolar fracture without residual structural instability, chronic ankle pain of neural origin is frequently multi-territorial and requires combined denervation of the contributing branches — typically some combination of deep peroneal, superficial peroneal, sural, and saphenous.^3,5 Series from Gohritz, Dellon, and other groups report good-to-excellent results in approximately 80% of patients in this population.³ Careful, sequential diagnostic blocks help identify which branches are the dominant pain generators and inform the operative plan.

5.3 Painful neuromas of the sural, saphenous, and superficial peroneal nerves

Painful neuromas of the peri-ankle cutaneous nerves are frequently encountered after prior open ankle surgery (lateral ligament repair, malleolar ORIF, hardware removal) or traumatic laceration. This population responds particularly well to neurectomy with proximal muscle implantation.^3,10 A well-localized Tinel sign at the site of the presumed neuroma, combined with a highly responsive diagnostic block (often ≥80–90% relief), predicts a favorable operative result. TMR or RPNI may be preferred over simple muscle implantation for larger neuromas.^12,13

5.4 Persistent pain after prior ankle surgery (arthrodesis, arthroscopy)

Following ankle arthrodesis or arthroscopy, some patients experience persistent pain that is disproportionate to imaging and unresponsive to expected recovery. When mechanical failure, hardware complication, and infection have been ruled out, selective denervation of the joint-supplying sensory nerves — with sequential diagnostic block guidance — can produce meaningful pain reduction in appropriately selected patients.^1,3 As with other indications, extraterritorial pain spread or a poor block response should redirect care toward the central-sensitization pathway.

5.5 Post-compartment syndrome / fasciotomy chronic foot pain

Distal saphenous nerve denervation has been reported for chronic medial foot pain following lower-extremity fasciotomy or post-compartment syndrome sequelae, based on a case series and subsequent literature from Kim and Dellon.¹⁴ The population is smaller and the evidence base narrower, but in patients with anatomically consistent medial foot pain and a highly responsive saphenous block, distal saphenous denervation is an appropriate consideration.

5.6 Summary of outcomes by indication

6. Comparison with Alternative Interventions

Selective ankle denervation sits alongside several alternative approaches to chronic ankle pain; the appropriate choice depends on the dominant driver, the structural state of the joint, and patient-specific factors.^15,16,17

7. Practical Integration

7.1 Referral flow

The typical referral pathway to selective ankle denervation runs through orthopedic foot-and-ankle, sports medicine, podiatric, and interventional pain colleagues. The patient who most benefits from early identification is the post-sprain or post-fracture patient with pain out of proportion to imaging, a neuropathic quality (burning, electric, well-localized to a nerve territory), and no correctable structural target. Early diagnostic block — well before consideration of any structural revision — is often the highest-value diagnostic step.

7.2 The value of early identification

Recognizing the neuropathic contribution early prevents the accumulation of failed structural interventions and the drift toward central sensitization that accompanies untreated neuropathic pain. In practice, a single well-executed diagnostic block, interpreted honestly, can resolve months of diagnostic uncertainty and either (a) redirect a patient away from unnecessary structural surgery, (b) confirm an appropriate denervation target, or (c) identify a dominant central component that requires a different care pathway entirely.

7.3 Illustrative composite cases

The following are illustrative composites, not real patients. They demonstrate how the framework applies at the point of clinical decision-making.

Case A — Sinus tarsi syndrome, favorable block

A 41-year-old recreational athlete with 14 months of deep, poorly localized pain over the lateral hindfoot after an inversion sprain. Imaging shows no ligamentous instability or bony pathology. Physical therapy, bracing, and a corticosteroid injection into the sinus tarsi have failed. Anatomically appropriate ultrasound-guided deep peroneal block produces 80% pain relief for the expected duration of the local anesthetic. Extraterritorial spread is absent; mood and sleep are unremarkable. Plan: proceed with selective deep peroneal denervation targeting the terminal articular branches to the sinus tarsi.

Case B — Painful sural neuroma after lateral ligament repair

A 29-year-old with a well-localized burning pain and a positive Tinel sign posterior to the lateral malleolus 11 months after Broström-type lateral ankle ligament repair. Pain is confined to the sural distribution. Diagnostic sural block yields 90% relief. Plan: sural neurectomy with proximal implantation into the peroneal or gastrocnemius muscle belly; consider RPNI if the terminal neuroma is bulbous.

Case C — Diffuse post-fracture pain, extraterritorial spread, poor block

A 52-year-old with persistent diffuse pain 18 months after tri-malleolar fracture with anatomic ORIF and radiographically well-healed fixation. Pain now involves the entire foot, ankle, and distal leg, with brush allodynia extending well beyond any single nerve territory. Sleep is fragmented; anxiety is prominent. Diagnostic superficial peroneal block yields 40% relief. Raasveld-Eberlin criteria met: 1, 2, 3, 4, and 5. Plan: denervation alone is unlikely to succeed on any single target; redirect to central-focused care — pain psychology referral, graded exposure PT, medication optimization (SNRI first-line), and honest framing of the diagnosis. Reconsider a limited surgical target only if the central component is reduced and a specific residual peripheral driver becomes identifiable.

8. Limitations and Considerations

• Anatomic variation. Terminal branching patterns of the sensory nerves at the ankle are variable; cadaveric studies document meaningful anatomic variability that must be anticipated intraoperatively.⁷
• Variable individual response. Even patients with a well-executed, highly responsive diagnostic block occasionally fail to achieve the expected relief after denervation; the block is a strong but imperfect predictor.
• Long-term regeneration. Regeneration of the transected nerve into a functionally meaningful sensory ending remains a theoretical concern despite muscle implantation; late recurrences are rare but described.
• Evidence quality. Most of the literature is retrospective case-series from experienced centers. Prospective, comparative data — including comparison with radiofrequency ablation and peripheral nerve stimulation — would strengthen the evidence base.
• Scope of application. Selective denervation is not appropriate as sole treatment for structural instability, active infection, unaddressed fracture, or dominant centralized pain. It is a targeted tool for a defined subpopulation, not a general answer to chronic ankle pain.

9. Conclusion

Selective ankle denervation is a technically well-established, evidence-supported, joint-sparing surgical option for chronic ankle pain of neural origin. It occupies a distinct role in the algorithm — neither a substitute for structural correction when structural correction is needed, nor an alternative to fusion or replacement in structurally driven arthritis, but the appropriate next step in a well-defined population of patients whose pain is neuropathic and whose diagnostic block is positive. Appropriate selection, honest interpretation of the diagnostic block, screening for central sensitization, and careful surgical technique with proximal nerve implantation are the determinants of outcome. The technique deserves broader awareness among orthopedic, sports medicine, podiatric, and pain colleagues who care for the patient with chronic ankle pain that persists after structural pathology has been addressed.