Also known as: Biopsy - nerve
- Axon degeneration (destruction of the axon portion of the nerve cell)
- Damage to the small nerves
- Inflammatory nerve conditions (neuropathies)
- Alcoholic neuropathy
- Axillary nerve dysfunction
- Brachial plexopathy
- Charcot-Marie-Tooth disease (hereditary)
- Common peroneal nerve dysfunction
- Distal median nerve dysfunction
- Mononeuritis multiplex
- Necrotizing vasculitis
- Radial nerve dysfunction
- Tibial nerve dysfunction
- Allergic reaction to the local anesthetic
- Discomfort after the procedure
- Infection (a slight risk any time the skin is broken)
- Permanent nerve damage (uncommon; minimized by careful site selection)
A nerve biopsy is the removal of a small piece of a nerve for examination.
How the Test is Performed
A nerve biopsy is most often done on a nerve in the ankle, forearm, or along a rib.
The health care provider applies medicine to numb the area before the procedure. The doctor makes a small surgical cut and removes a piece of the nerve. The cut is then closed and a bandage put on it. The nerve sample is sent to a lab, where it is examined under a microscope.
How to Prepare for the Test
There is no special preparation.
How the Test will Feel
When the numbing medicine (local anesthetic) is injected, you will feel a prick and a mild sting. The biopsy site may be sore for a few days after the test.
Why the Test is Performed
Nerve biopsy may be done to help diagnose:
Conditions for which the test may be done include any of the following:
A normal result means the nerve appears normal.
What Abnormal Results Mean
Abnormal results may be due to:
Nerve biopsy is invasive and is useful only in certain situations. Talk to your provider about your options.
Shy ME. Peripheral neuropathies. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 420.
Weis J, Brandner S, Lammens M, Sommer C, Vallat JM. Processing of nerve biopsies: a practical guide for neuropathologists. Clin Neuropathol. 2012;31:7-23. PMID: 22192700 www.ncbi.nlm.nih.gov/pubmed/22192700.
- Review date:
- January 06, 2015
- Reviewed by:
- Daniel Kantor, MD, Kantor Neurology, Coconut Creek, FL and Immediate Past President of the Florida Society of Neurology (FSN), Gainesville, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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