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Endocrine glands
Endocrine glands


Parathyroid biopsy
Parathyroid biopsy


Definition:

A parathyroid biopsy is a procedure to remove a small piece of a parathyroid gland. The parathyroid glands are the four glands behind the thyroid in the neck.



Alternative Names:

Biopsy - parathyroid



How the test is performed:

A parathyroid biopsy is done while the patient is awake. Using an ultrasound machine, the health care provider locates the gland of concern. A thin needle is inserted directly into the gland, and a small piece of tissue is removed.

The tissue is sent to a laboratory, where it is examined under a microscope. The tissue's levels of parathyroid hormone (PTH) will also be checked. PTH is secreted by the parathyroid glands and helps control the body's calcium levels.



How to prepare for the test:

Tell your health care provider if you have any drug allergies or bleeding problems, or if you are pregnant. You must sign a consent form. Also, make sure the health care provider knows about all the medications you are taking.



How the test will feel:

The test feels like a quick shot (injection). You may feel a sting as the needle is inserted into the gland.



Why the test is performed:

This procedure is most often done to confirm the cause of hyperparathyroidism .

It may also be done if an ultrasound exam shows a larger-than-normal parathyroid gland. Your doctor can only see a parathyroid gland on ultrasound if it is abnormally swollen.



Normal Values:

There is no swelling, hormone levels appear normal, and cells from the tissue sample are normal.

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.



What abnormal results mean:

The test confirms that a parathyroid gland is enlarged, if hormone levels are too high, or if cells from the sample are abnormal.

Abnormal results may be due to:



What the risks are: The main risk is bleeding into or around the thyroid gland. If bleeding is severe, it may put pressure on the windpipe (trachea). This complication is rare.

Special considerations:

You can return to normal activities the same day.




Review Date: 7/22/2008
Reviewed By: Robert A. Cowles, MD, Assistant Professor of Surgery, Columbia University College of Physicians and Surgeons, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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