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 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 may be done if you have symptoms of carpal tunnel syndrome and your health care provider suspects that you may have amyloidosis.
No abnormal tissues are found.
What Abnormal Results Mean
Amyloidosis involving the carpal tunnel.
Damage to the nerve in this area
Infection (a slight risk any time the skin is broken)
If the biopsy indicates abnormalities of the carpal tunnel, your health care provider may suggest the carpal tunnel release procedure. Your provider may also recommend more surgery to fix or improve the abnormality.