Carpal tunnel biopsy - Overview

Alternative Names

Biopsy - carpal tunnel

Definition of Carpal tunnel biopsy:

Carpal tunnel biopsy is a test in which a small piece of tissue is removed from the carpal tunnel (part of the wrist).

How the test is performed:

The skin of your wrist is scrubbed and injected with medicine that numbs the area. Through a small cut, a sample of tissue is removed from the carpal tunnel. This is done by direct removal of tissue or by needle aspiration.

Sometimes this procedure is performed at the time of carpal tunnel release.

How to prepare for the test:

Your doctor may ask that you not eat anything for a few hours before the test.

How the test will feel:

You may feel some stinging or burning when the numbing medicine is injected. You may also feel some pressure or tugging during the procedure. Afterward, the area may be tender or sore for a few days.

Why the test is performed:

This test is usually done to rule out a condition called amyloidosis.

Carpal tunnel syndrome

Surface anatomy - normal palm

Surface anatomy - normal wrist

Carpal biopsy

Reviewed last on: 7/28/2010
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Rajkumar SV, Dispenzieri A. Multiple myeloma and related disorders. In: Abeloff MD, Armitage JO, Niederhuber JE, Kastan MB, McKenna WG, eds. Abeloff’s Clinical Oncology. 4th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 110.

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