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Carpal tunnel biopsy

Definition

Carpal tunnel biopsy is a diagnostic procedure in which a small portion 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 a local anesthetic, which numbs the area. Through a small incision, a sample of tissue is removed from the carpal tunnel (by direct removal of tissue or needle aspiration).

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

How to prepare for the test

Fasting may be advised for a few hours before the test.

For infants and children, the physical and psychological preparation you can provide for this test depends on your child's age and experience. For specific information regarding how you can prepare your child, see the following topics:

How the test will feel

You may feel some stinging or burning when the local anesthetic 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 may be performed when the diagnosis of amyloidosis is suspected in a patient with symptoms consistent with carpal tunnel syndrome.

Normal Values

No abnormal tissues are found.

What abnormal results mean

Amyloidosis involving the carpal tunnel.

What the risks are

  • Infection (a slight risk any time the skin is broken)
  • Bleeding
  • Damage to the nerve in this area

Special considerations

If the biopsy indicates abnormalities of the carpal tunnel, your health care provider may suggest the carpal tunnel release procedure and/or further surgery to address the abnormality.

Illustrations

Carpal tunnel syndrome
Carpal tunnel syndrome
Surface anatomy - normal palm
Surface anatomy - normal palm
Surface anatomy - normal wrist
Surface anatomy - normal wrist
Carpal biopsy
Carpal biopsy

Page Content:

Biopsy - carpal tunnel