Working… Menu

Comparison of Alcohol and Steroid Injection for Treating Morton's Neuroma

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00284583
Recruitment Status : Unknown
Verified January 2006 by Brown University.
Recruitment status was:  Recruiting
First Posted : February 1, 2006
Last Update Posted : February 1, 2006
Information provided by:
Brown University

Brief Summary:

Interdigital neuroma is a painful forefoot disorder characterized by plantar pain and toe paresthesias thought to result from entrapment of the interdigital nerve by the overlying transverse metatarsal ligament. Multiple treatments have been recommended for this condition and range from modification of shoe wear to surgical excision of the painful nerve. Serial ethanol injection therapy has been reported to be an effective alternative to surgical excision. However, despite wide adoption of this treatment, no randomized, double blinded, placebo-controlled study exists to verify the efficacy of this treatment in comparison to longer standing similar therapies, such as corticosteroid injection.

120 patients from one Orthopaedic group's foot and ankle offices with single foot neuromas and no previous history of neuroma or foot disorder treatment will be selected for the study. These patients will be randomized to three treatments, specifically lidocaine injection, corticosteroid injection, or ethanol injection. Outcomes will be assessed at 3, 6 and 12 month time points using validated questionnaires as well as a non-validated disease specific questionnaire. Primary endpoint will be graded change in the physical function portion of the SF-36 form. Secondary endpoints will be the graded change in the McGill Short Form for Pain and ultimate satisfaction with treatment as assessed by a non-validated questionnaire designed for Morton's neuroma symptoms.

Condition or disease Intervention/treatment Phase
Morton's Neuroma Drug: Injection of Steroid into Foot Drug: Injection of Alcohol into Foot Drug: Injection of Lidocaine into Foot Not Applicable

Detailed Description:

Interdigital neuroma, or Morton's Neuroma, is a painful forefoot disorder characterized by plantar pain and paresthesias radiating to toes. The condition was first described in 1845 by Lewis Durlacher as a painful "neuralgic affection" of the plantar nerve between the third and fourth metatarsals. T.G. Morton, in 1876, attributed the painful symptom complex to a "neuroma." His observation was confirmed by Hoadley who, in 1893, performed a curative excision of a "neuroma" between the third and fourth metatarsals.

Current understanding of interdigital neuroma is based on Gauthier's conclusion in 1979 that the symptom complex was a result of an entrapment neuropathy of the interdigital nerve by the overlying transverse metatarsal ligament. Presently, no definitive single etiology has been confirmed. Additional potential pathoetiologies include the aberrant anatomy of the plantar nerve in this location, trauma and extrinsic mass effect above or below the level of the transverse metatarsal ligament.(3,6) The histological appearance of the affected nerve, however, is consistent and suggests that "neuroma" is a misnomer for this condition. The nerve tissue demonstrates demyelination and deposition of amorphous eosinophilic material, but no exuberant proliferation of nerve endings characteristic of neuroma.(3)

Multiple treatments have been recommended for the management of interdigital neuroma. The usual algorithm begins with an attempt at conservative therapy consisting of shoe wear modifications and the application of a metatarsal pad. Failure of conservative management may prompt a trial of corticosteroid injections.(8) Persistent symptoms ultimately require surgical excision or division of the transverse metatarsal ligament, both of which have good long term outcomes in literature.(2,7)

Recently, serial ethanol injection therapy has been reported to be an effective alternative to surgical excision and has been widely adopted in the treatment of Morton's neuroma. Dockery et. al. reported 89% success rate in a series of 100 consecutive patients treated with 3 to 7 injections of 4% ethanol solutions with an average follow-up of 13 months. Fanucci and Masala reported a 90% success rate at 10 month follow-up after 3 to 7 injections of 30% alcohol in a consecutive series of 40 patients. However, none of these studies were performed in a randomized, double blinded fashion with adequate controls. Therefore, no scientifically valid conclusions concerning treatment efficacy can be made.

The proposed study investigates alcohol sclerosing therapy for the treatment of Morton's neuroma in a randomized, double-blinded, placebo-controlled clinical trial. The primary end point will be evaluation of patient physical function according to the standardized SF-36 questionnaire after the treatment period. Secondary end points include evaluation of pain and satisfaction levels after treatment using, respectively, a standardized and a novel questionnaire.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Enrollment : 120 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Comparison of Corticosteroid and Ethanol Injection Therapy in the Treatment of Morton's Neuroma
Study Start Date : May 2005

Resource links provided by the National Library of Medicine

Drug Information available for: Ethanol

Primary Outcome Measures :
  1. 1. Pain Scale
  2. 2. Physical function scale.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

2 months of 2 or more of the following

  • Plantar pain increased by walking localized to the 2nd and 3rd interspaces
  • Relief of pain by resting
  • Pain radiating into toes
  • Numbness in toes or foot
  • Cramping in toes and foot

    2 or More of the Following physical Findings

  • Plantar tenderness
  • Radiation of elicited pain into the toes
  • Palpable plantar mass
  • Numbness in toes
  • Exacerbation of symptoms with Mulder's maneuver

Exclusion Criteria:

  • Past treatment for Morton's neuroma or had prior foot surgery.
  • Concurrent conditions such as hallux valgus, metatarsalgia, lesser toe abnormalities, atraumatic synovitis of metatarsophalangeal joint and other foot and ankle based nerve compression neuropathies.
  • Further, patients with neuroma symptoms in the 1st and 4th interspaces.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00284583

Layout table for location contacts
Contact: Mark C Lee, MD 401-350-6432

Layout table for location information
United States, Rhode Island
Rhode Island Hospital Orthopaedic Clinic Recruiting
Providence, Rhode Island, United States, 02908
Sub-Investigator: Mark C Lee, MD         
Principal Investigator: Christopher Digiovanni, MD         
Sponsors and Collaborators
Brown University
Layout table for investigator information
Principal Investigator: Christopher Digiovanni, MD Rhode Island Hospital, Brown Medical School
Layout table for additonal information Identifier: NCT00284583    
Other Study ID Numbers: 0061-05
First Posted: February 1, 2006    Key Record Dates
Last Update Posted: February 1, 2006
Last Verified: January 2006
Keywords provided by Brown University:
Morton's Neuroma
Additional relevant MeSH terms:
Layout table for MeSH terms
Morton Neuroma
Nerve Sheath Neoplasms
Neoplasms, Nerve Tissue
Neoplasms by Histologic Type
Foot Diseases
Musculoskeletal Diseases
Joint Diseases
Peripheral Nervous System Diseases
Neuromuscular Diseases
Nervous System Diseases
Neurologic Manifestations
Anesthetics, Local
Central Nervous System Depressants
Physiological Effects of Drugs
Sensory System Agents
Peripheral Nervous System Agents
Anti-Arrhythmia Agents
Voltage-Gated Sodium Channel Blockers
Sodium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action