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Morton's Neuroma Excision

Excision of interdigital neuroma (3rd webspace) for FRCS/FRACS exam preparation

Core Procedure
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High-yield overview

Dorsal or plantar longitudinal incision over intermetatarsal space | basic

Surgical Imaging

Imaging Gallery

Excised Morton's neuroma specimen on ruler showing approximately 2.5 cm length with fusiform swelling
Excised Morton's neuroma specimen: the resected interdigital nerve is shown on a ruler measuring approximately 2.5 cm in total length. The characteristic fusiform swelling at the common digital nerve bifurcation is clearly visible — the thickened perineural fibrosis gives the neuroma its grey-white appearance. This specimen from the third webspace shows the typical morphology of a symptomatic Morton's neuroma with the nerve stumps visible at both ends.Credit: Open-i NIH (PMC5143741) (CC BY PMC Open Access)
Two-panel intraoperative dorsal incision showing neuroma exposure with wound edges retracted
Dorsal approach — intraoperative neuroma exposure: two-panel (a) and (b) views showing the interdigital space accessed through a dorsal longitudinal incision. The wound edges are held open with blue retention sutures, and the pale, firm neuroma (the thickened common digital nerve) is visualised between the metatarsal heads. Panel (b) shows the neuroma mobilised prior to division of the deep transverse metatarsal ligament and proximal excision.Credit: Open-i NIH (PMC5143741) (CC BY PMC Open Access)

Critical Danger Structures

Danger 1: Adjacent Digital Nerve

Cutting the wrong nerve or the adjacent digital nerve. The 3rd common digital nerve is the target, but the 2nd and 4th digital nerves run immediately adjacent. In the dorsal approach the plane is deeper than expected and spatial orientation can be lost. Prevention: mark the correct webspace before skin incision, confirm the space by counting from the first webspace under direct vision, identify the transverse metatarsal ligament as the key landmark, and gently probe plantar to the ligament before excising any neural tissue.

Danger 2: Incomplete Excision / Stump Neuroma

Failure to excise 3 cm proximal to the bifurcation causes stump neuroma formation — the most common cause of persistent or recurrent symptoms after surgery. Prevention: after dividing the transverse metatarsal ligament, follow the nerve proximally into the intrinsic muscle belly and cut with a single sharp transection at least 3 cm from the bifurcation under direct vision. Never avulse or tear the nerve proximally. Confirm a clean cut edge and that the proximal stump retracts into muscle.

Danger 3: Plantar Digital Vessels

Plantar digital arteries and veins run alongside the digital nerves in the neurovascular bundle. Injury during blunt dissection or when dividing the nerve distally can cause digital ischaemia (if the dominant arterial contribution is sacrificed) or troublesome haematoma. Prevention: use sharp dissection in the webspace under direct vision, identify the nerve-vessel bundle anatomy before dividing distally, apply bipolar cautery to small vessels away from the nerve, and confirm capillary refill in the adjacent toes before wound closure.

Danger 4: Wound Dehiscence (Plantar Approach)

Plantar skin heals under shear and compressive load. A longitudinal plantar incision risks delayed healing, painful hypertrophic scar, or dehiscence if placed over the direct weight-bearing surface between the metatarsal heads. Prevention: site the plantar incision 1 cm distal to the metatarsal heads in the interdigital crease, not directly under the metatarsal heads; use non-weight-bearing mobilisation for at least 2 weeks; close with interrupted non-absorbable sutures; and offload with a post-operative shoe.

Danger 5: Painful Plantar Scar

Plantar scar sensitivity and chronic scar pain remain the principal disadvantage of the plantar approach and the main reason surgeons prefer the dorsal route. A hypertrophic or adherent plantar scar can be more disabling than the original neuroma. Prevention: use a direct longitudinal incision (not oblique or curved) in the non-weight-bearing interdigital crease, ensure meticulous wound closure, provide early scar management with silicone gel and massage from suture removal, and counsel the patient pre-operatively regarding this risk.

Mnemonic

NERVENERVE - Morton's Neuroma Excision Steps

Mnemonic

SADSAD - Causes of Failed Morton's Neuroma Surgery

Primary Indications

Absolute Indications

  • Failed conservative management for a minimum of 3-6 months
  • At least one (preferably two) corticosteroid injection trials without sustained relief
  • Disabling forefoot pain confirmed to the intermetatarsal space
  • Positive Mulder's click and webspace tenderness correlating with symptoms

Relative Indications

  • Diagnostic ultrasound or MRI confirming a neuroma greater than 5 mm in transverse diameter
  • Significant functional limitation despite optimal footwear and orthotic modifications
  • Occupation or sporting activity requiring tight footwear that cannot be avoided
  • Patient preference after comprehensive counselling about all conservative options

Contraindications

  • Active foot infection or skin breakdown overlying the planned surgical site
  • Peripheral arterial disease with compromised perfusion to the forefoot
  • Inadequate conservative trial (less than 3 months)
  • Uncertain diagnosis — diffuse forefoot pain without a clear focal examination finding
  • Uncontrolled diabetes mellitus with peripheral neuropathy masking symptoms

Epidemiology and Natural History

Morton's neuroma predominantly affects women (female to male ratio approximately 5:1) in the fourth to sixth decades. The 3rd webspace (between the 3rd and 4th metatarsals) accounts for approximately 70% of cases, with the 2nd webspace (15-20%) the next most common. True simultaneous bilateral neuromas occur in less than 5% of cases.

The condition arises from chronic perineural fibrosis secondary to repetitive microtrauma and compression between adjacent metatarsal heads during toe dorsiflexion. High-heeled, narrow footwear is the strongest modifiable risk factor.

Conservative Management Before Surgery

Step-wise Approach

  • Footwear modification: Wide, deep toe box, low heel (less than 4 cm). First-line, always trialled
  • Metatarsal pad or dome: Placed proximal to the metatarsal heads to separate the interspace
  • Corticosteroid injection: Ultrasound-guided injection into the webspace. A systematic review (Edwards 2021, 10 studies, 695 patients) found a moderate short- to medium-term benefit on pain, superior to usual care but inferior to surgical excision; two injections are standard before recommending surgery. Repeated injections beyond two add limited benefit and risk plantar fat pad atrophy and skin depigmentation
  • Sclerosing alcohol injection: Emerging option with mixed evidence. The largest series (Hughes 2007, 101 patients, mean 4.1 injections) reported 94% symptom improvement and 84% pain-free at a mean 21 months, but a subsequent longer-term cohort by the same group showed substantial relapse, and high-quality RCT data are lacking

Evidence: Dorsal vs Plantar Approach

Akermark et al. (2013) RCT — Key Study

The definitive comparative study is the prospective randomised controlled trial by Akermark and colleagues (Foot Ankle Int 2013), which randomised 76 patients (93% follow-up to a mean of 34 months) to a plantar or dorsal incision. Contrary to a widely repeated misconception, this Level I trial found no significant difference between the two routes in pain at daily activities, restriction of daily activities, or scar tenderness. Clinically good outcomes were achieved in 87% (plantar) and 83% (dorsal); pain was reduced by 96-97% in both groups. The only meaningful difference was in the type of complications, not the overall outcome.

Clinical Practice Pattern

The dorsal approach remains the more widely used route in clinical practice. The principal reason is avoidance of a weight-bearing plantar scar: the Cochrane review (Thomson 2004) found limited evidence that dorsal incisions produce fewer symptomatic post-operative scars, and Faraj's comparative series similarly reported fewer scar problems and faster rehabilitation with the dorsal route. Both approaches achieve reliable neuroma excision when performed correctly; the key determinant of outcome is adequacy of proximal nerve excision, not the approach route.

Current Evidence Summary

  • Dorsal approach: More widely used, avoids a weight-bearing plantar scar, faster return to weight-bearing and work, technically familiar; requires division of the deep transverse metatarsal ligament to expose the neuroma
  • Plantar approach: Direct access to the neurovascular bundle without traversing the intrinsic musculature; favoured by some for revision surgery; principal trade-off is the risk of a painful plantar scar
  • Recommendation: Both are acceptable and produce equivalent excision rates; surgeons should be competent in both and able to quote the Akermark 2013 RCT accurately (no significant outcome difference) and the dorsal-scar advantage from Cochrane/Faraj

Clinical Decision Scenarios

Use these scenarios to practise clinical reasoning and management decisions

CLINICAL SCENARIOStandard

CLINICAL PROMPT

"A 48-year-old female teacher presents with 9 months of burning forefoot pain between the 3rd and 4th toes, worse in high-heeled shoes and relieved by removing footwear. Mulder's click is positive and point tenderness is maximal in the 3rd webspace. Ultrasound shows a hypoechoic lesion measuring 6 mm in the 3rd intermetatarsal space consistent with neuroma. She has tried wide shoes and a metatarsal pad for 4 months. What is your management?"

PRACTICAL APPROACH
This patient has symptomatic Morton's neuroma of the 3rd webspace with appropriate clinical and ultrasound confirmation. Conservative management for 4 months has been commenced but has not yet been fully optimised. My first step would be to ensure conservative treatment has been truly exhausted: a proper wide toe-box shoe with heel height less than 4 cm, a correctly positioned metatarsal pad placed proximal to the metatarsal heads (many patients are given incorrectly positioned pads), and a formal orthotist review. If she has not had a corticosteroid injection, I would offer one to two ultrasound-guided injections into the 3rd intermetatarsal space before recommending surgery. Short-term success rates for corticosteroid injection are 40-80%, though sustained relief at 12 months is achieved in only 30-40% of cases. If she has completed two injection trials and a minimum 6-month conservative course without adequate relief, surgical excision is indicated. I would consent her for Morton's neuroma excision via a dorsal or plantar longitudinal approach and would specifically counsel her that the operation will result in permanent numbness to the adjacent surfaces of the 3rd and 4th toes — this is expected and is the result of removing the nerve, not a complication. I would explain that overall success rates are 80-85% at 1 year, with stump neuroma the most important complication in 10-20%, caused by inadequate proximal excision. Surgically, the key steps are: pre-operative marking of the correct webspace with her awake, division of the deep transverse metatarsal ligament to expose the neuroma plantar to it, and excision with at least 3 cm of proximal nerve with a single sharp cut allowing the stump to retract into the intrinsic muscle belly. I would leave the DTML open after division and recover her in a stiff-soled shoe permitting weight-bearing from Day 1.
CLINICAL SCENARIOStandard

CLINICAL PROMPT

"Discuss the dorsal versus plantar approach for Morton's neuroma excision. What does the evidence show, and which approach would you use in a primary case and in a revision case?"

PRACTICAL APPROACH
The dorsal and plantar approaches both provide access to the 3rd intermetatarsal space and allow excision of the neuroma, but they have different anatomical exposure and practical trade-offs. The key evidence is the Akermark et al. (2013) randomised controlled trial of 76 patients (Level I, 93% follow-up to a mean of 34 months) comparing the two approaches. Crucially — and this is a commonly misquoted study — it found NO significant difference between the routes in pain at daily activities, restriction of daily activities, or scar tenderness. Clinically good outcomes were 87% (plantar) and 83% (dorsal), with pain reduced by 96-97% in both groups; the only difference was in the type of complications. So the honest evidence-based answer is that both approaches give equivalent results, and the most important outcome determinant is adequacy of proximal excision, not the route. Where the evidence does favour one route, it favours the dorsal: the Cochrane review (Thomson 2004) found limited evidence that dorsal incisions produce fewer symptomatic post-operative scars, and Faraj's comparative series reported fewer scar problems and faster return to weight-bearing and work with the dorsal approach. The concern with the plantar approach is the weight-bearing scar between the metatarsal heads, which can become painful, hypertrophic, or adherent — occasionally more disabling than the original neuroma. For a primary case in a patient with standard anatomy, I would use a dorsal approach given its familiarity, the dorsal-scar advantage, faster rehabilitation, and equivalent excision outcomes. The technical priority remains a clean proximal transection at least 3 cm proximal to the bifurcation with the stump allowed to retract into the intrinsic muscle. For a revision case where a previous dorsal approach has been performed, I would consider the plantar approach. Some surgeons favour it because the dorsal scar distorts the interspace anatomy and the plantar route gives direct access to the proximal nerve through virgin tissue; I would counsel the revision patient specifically about plantar scar risk and the generally inferior outcomes of revision compared with primary surgery.
CLINICAL SCENARIOStandard

CLINICAL PROMPT

"A 52-year-old patient returns 14 months after Morton's neuroma excision complaining of persistent burning pain in exactly the same location as pre-operatively, now with a positive Tinel's sign at the scar site. What has happened and how do you manage this?"

PRACTICAL APPROACH
This presentation is highly consistent with a stump neuroma following inadequate proximal nerve excision. A stump neuroma forms when the proximal end of the divided nerve lies in subcutaneous fat or in a location subject to mechanical pressure rather than being retracted into the protected intrinsic muscle belly. The regenerating axons at the cut end proliferate into a disorganised mass that becomes the neuroma, which is exquisitely sensitive to mechanical stimulation — hence the positive Tinel's sign at the scar site, the burning neuropathic quality, and the exact reproduction of the original pain distribution. My initial assessment would confirm the clinical diagnosis and exclude other causes of persistent forefoot pain that are not stump neuroma: MTP synovitis, a second adjacent-space neuroma that was missed at primary surgery (double neuromas in 5-10%), Freiberg's infraction, stress fracture, or plantar plate tear. I would request MRI or high-resolution ultrasound of the forefoot to: confirm a stump neuroma mass at the surgical site, identify any residual primary neuroma, assess the 2nd webspace for a simultaneous neuroma, and exclude bony pathology. Initial management is conservative: desensitisation physiotherapy, cushioned metatarsal-offloading footwear, and ultrasound-guided corticosteroid injection directly into the stump neuroma. I would give this at least 3-6 months before considering revision surgery. If conservative measures fail, I would plan revision surgery via the plantar approach to avoid the dorsal scar and to access the proximal nerve through virgin tissue. At revision, the stump is identified, excised further proximally, and the new cut end is buried deeply into the intrinsic muscle belly or between the metatarsal shafts to prevent re-forming under pressure. Centrocentral neurorrhaphy — joining two adjacent cut nerve ends together — is a described technique that prevents end-bulb formation. I must counsel the patient that revision surgery outcomes for stump neuroma are substantially inferior to primary excision: success rates fall to approximately 50-60%, and there is a risk of developing yet another stump neuroma or chronic regional pain syndrome.

Morton's Neuroma Excision — Exam Summary

Clinical summary

Key Evidence

Evidence Base

A prospective randomized controlled trial of plantar versus dorsal incisions for operative treatment of primary Morton's neuroma

Level I
Akermark C, Crone H, Skoog A, Weidenhielm L • Foot & Ankle International
Clinical Implication: The definitive comparative trial shows the two approaches give equivalent outcomes. It is frequently misquoted as favouring the plantar route — quote it accurately: no significant difference, with the choice of approach driven by scar considerations rather than excision efficacy.
Verify on PubMed (PMID 23564425)

Interventions for the treatment of Morton's neuroma (Cochrane systematic review)

Level I
Thomson CE, Gibson JNA, Martin D • Cochrane Database of Systematic Reviews
Clinical Implication: Underpins the practical preference for the dorsal approach (fewer symptomatic scars) and highlights how thin the high-quality evidence base remains across both conservative and surgical management.
Verify on PubMed (PMID 15266472)

Digital nerves of the foot: anatomic variations and implications regarding the pathogenesis of interdigital neuroma

Level III
Levitsky KA, Alman BA, Jevsevar DS, Morehead J • Foot & Ankle
Clinical Implication: Refutes the commonly taught 'dual nerve contribution makes a thicker nerve' explanation; the higher incidence in the 2nd and 3rd webspaces is best explained mechanically by the narrower intermetatarsal head distance.
Verify on PubMed (PMID 8359767)

Efficacy of a single corticosteroid injection for Morton's neuroma in adults: a systematic review

Level I
Edwards SR, Fleming S, Landorf KB • Journal of the American Podiatric Medical Association
Clinical Implication: Justifies a trial of one to two corticosteroid injections as part of conservative management before surgery, while setting realistic expectations: relief is short- to medium-term and inferior to surgical excision.
Verify on PubMed (PMID 34478534)

Treatment of Morton's neuroma with alcohol injection under sonographic guidance: follow-up of 101 cases

Level II
Hughes RJ, Ali K, Jones H, Kendall S, Connell DA • AJR American Journal of Roentgenology
Clinical Implication: Sclerosing alcohol injection is a reasonable minimally invasive option, but enthusiasm should be tempered: longer-term cohorts show relapse and high-quality RCT data are lacking, so surgery remains the definitive treatment for refractory cases.
Verify on PubMed (PMID 17515373)

References

  1. Akermark C, Crone H, Skoog A, Weidenhielm L. A prospective randomized controlled trial of plantar versus dorsal incisions for operative treatment of primary Morton's neuroma. Foot Ankle Int. 2013;34(9):1198-1204. PMID 23564425. DOI 10.1177/1071100713484300. Level I RCT of 76 patients showing NO significant difference between dorsal and plantar approaches in pain or scar tenderness (87% vs 83% good outcomes) — the definitive comparative approach study, frequently misquoted.

  2. Thomson CE, Gibson JN, Martin D. Interventions for the treatment of Morton's neuroma. Cochrane Database Syst Rev. 2004;(3):CD003118. PMID 15266472. DOI 10.1002/14651858.CD003118.pub2. Systematic review of surgical and conservative interventions; establishes the evidence base for surgical excision and highlights the paucity of high-quality RCT data for most conservative measures.

  3. Vito GR, Talarico LM, Goldstein NR. Intermetatarsal neuromas. Overview and treatment. J Am Podiatr Med Assoc. 2003;93(2):97-102. Comprehensive review of diagnosis, conservative management, and surgical indications — widely cited for epidemiology and conservative-to-surgery thresholds.

  4. Faraj AA, Hosur A. The outcome after using two different approaches for excision of Morton's neuroma. Chin Med J (Engl). 2010;123(16):2195-2198. PMID 20819664. Retrospective single-surgeon comparison (42 feet, 85% good/excellent) showing the DORSAL approach gave faster rehabilitation and fewer scar problems than the plantar approach.

  5. Mulder JD. The causative mechanism in Morton's metatarsalgia. J Bone Joint Surg Br. 1951;33-B(1):94-95. PMID 14814167. DOI 10.1302/0301-620X.33B1.94. Classic original description of the clinical sign (Mulder's click) that remains the cornerstone of clinical diagnosis.

  6. Levitsky KA, Alman BA, Jevsevar DS, Morehead J. Digital nerves of the foot: anatomic variations and implications regarding the pathogenesis of interdigital neuroma. Foot Ankle. 1993;14(4):208-214. PMID 8359767. DOI 10.1177/107110079301400406. Cadaveric study of 71 feet showing the inter-nervous communication is present in only 27% and does NOT make the nerve thicker; supports a mechanical (narrow intermetatarsal head distance) basis for the higher 2nd/3rd webspace neuroma frequency.

  7. Colgrove RC, Huang EY, Ballard BI, Evans DR. Interdigital neuroma: intermuscular neuroma transposition compared with resection. Foot Ankle Int. 2000;21(3):206-211. Study comparing excision versus neuroma transposition (burial) for primary and stump neuromas; provides data on stump neuroma management.

  8. Hassouna H, Singh D. Morton's metatarsalgia: pathogenesis, aetiology and current management. Acta Orthop Belg. 2005;71(6):646-655. Comprehensive narrative review of pathogenesis, conservative management algorithm, and surgical technique with outcomes data.

  9. Hughes RJ, Ali K, Jones H, Kendall S, Connell DA. Treatment of Morton's neuroma with alcohol injection under sonographic guidance: follow-up of 101 cases. AJR Am J Roentgenol. 2007;188(6):1535-1539. PMID 17515373. DOI 10.2214/AJR.06.1463. Prospective series of 101 patients (94% improved, 84% pain-free at mean 21 months); establishes short-term success of sclerosing alcohol injection.

  10. Edwards SR, Fleming S, Landorf KB. Efficacy of a single corticosteroid injection for Morton's neuroma in adults: a systematic review. J Am Podiatr Med Assoc. 2021;111(4):Article 20-151. PMID 34478534. DOI 10.7547/20-151. Systematic review (10 studies, 695 patients) finding moderate short- to medium-term benefit of corticosteroid injection, superior to usual care but inferior to surgical excision.

  11. Bencardino J, Rosenberg ZS, Beltran J, Liu X, Marty-Delfaut E. Morton's neuroma: is it always symptomatic? AJR Am J Roentgenol. 2000;175(3):649-653. Imaging study demonstrating incidental neuromas on MRI in asymptomatic subjects — important for contextualising imaging findings and avoiding over-diagnosis.