Morton's neuroma is an inflammation of the nerves in the foot that go to the toes. Although the name includes the word “neuroma,” it is not really a tumor. It can affect any of the toes in the foot. However, it most often affects the nerves that run between the third and fourth, or second and third toes.
Nerves of the Foot
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Morton's neuroma is an inflammation caused by a buildup of fibrous tissue on the outer coating of nerves. This fibrous buildup is a reaction to the irritation resulting from nearby bones and ligaments rubbing against the nerves.
Irritation can be caused by:
It is unusual for more than one Morton's neuroma to occur on one foot at the same time. It is rare for Morton's neuroma to occur on both feet at the same time.
Morton's neuroma is more common in women. Other factors that may increase your chance of Morton's neuroma include:
Morton's neuroma may cause:
The doctor will ask about your symptoms and medical history. A physical exam will be done. Initial diagnosis of Morton's neuroma is based on your description of the type and location of pain and discomfort in the foot. The diagnosis will be confirmed by:
Imaging tests evaluate the foot and surrounding structures. This may be done with:
Injections of local anesthetic can also be used for diagnosis
Treatments may include:
The foot may be injected with corticosteroids mixed with a local anesthetic in order to reduce pain. Relief may be only temporary, however, if the mechanical irritation is not also corrected. Injections with other types of medications such as alcohol, phenol, or vitamin B12 are sometimes used.
Surgery to remove the neuroma may be recommended if more conservative treatment does not solve the problem. While surgery usually relieves or completely removes the symptoms, it often leaves a permanent numb feeling at the site of the neuroma.
American Podiatric Medical Association
National Institute of Arthritis and Musculoskeletal and Skin Diseases
Canadian Orthopaedic Association
Canadian Orthopaedic Foundation
Clinical Practice Guideline Forefoot Disorders Panel, Thomas JL, Blitch EL 4th, Chaney DM, et al. Diagnosis and treatment of forefoot disorders. Section 3. Morton's intermetatarsal neuroma. J Foot Ankle Surg. 2009;48(2):251-256.
Morton neuroma. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated April 16, 2014. Accessed August 20, 2014.
Morton's neuroma (intermetatatarsal neuroma). American College of Foot and Ankle Surgeons' Foot Health Facts website. Available at: http://www.foothealthfacts.org/footankleinfo/mortons-neuroma.htm?terms=morton%27s%20neuroma. Accessed August 20, 2014.
Thomson CE, Gibson JN, Martin D. Interventions for the treatment of Morton's neuroma. Cochrane Database of Sys Rev. 2004;(3):CD003118.
Last reviewed August 2014 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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