A nerve biopsy is the removal of a small piece of a nerve for examination.
Biopsy - nerve
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:
Risks of the procedure may include:
Nerve biopsy is invasive and is useful only in certain situations. Talk to your provider about your options.
Chernecky CC, Berger BJ. Nerve biopsy - diagnostic. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO: Elsevier Saunders; 2013:814-815.
Shy ME. Peripheral neuropathies. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 420.
Review Date: 5/15/2017
Reviewed By: Amit M. Shelat, DO, FACP, Attending Neurologist and Assistant Professor of Clinical Neurology, SUNY Stony Brook, School of Medicine, Stony Brook, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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