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Lymphatic system
Lymphatic system


Lymph node metastases, CT scan
Lymph node metastases, CT scan


Definition:

Lymph node biopsy is a test in which a lymph node or a piece of a lymph node is removed for examination under a microscope.

The lymphatic system is made up of lymph nodes connected by lymph vessels. The nodes produce white blood cells (lymphocytes) that fight infections. When an infection is present, the lymph nodes swell, produce more white blood cells, and attempt to trap the organisms that are causing the infection. The lymph nodes also try to trap cancer cells.



Alternative Names:

Biopsy - lymph nodes



How the test is performed:

The test is done in an operating room in a hospital, or at an outpatient surgical facility. There are two ways the sample may be obtained:

A needle biopsy involves inserting a needle into a lymph node. You will lie on the examination table. The biopsy site will be cleansed, and the health care provider will inject a local anesthetic (numbing medication) into the area. The biopsy needle is then inserted into the node, and a sample is removed. Pressure is applied to the site to stop the bleeding, and a bandage is applied.

An open biopsy is surgery to remove all or part of the lymph node. You will lie on the examination table. You may be given a medicine to calm you and make you sleepy, if you prefer. The biopsy site will be cleansed, and the health care provider will inject a local anesthetic (numbing medication) into the area. (Occasionally, general anesthesia is used, which means you are asleep and pain-free.) A small surgical cut is made, and the lymph node or part of the node is removed. The area is closed with stitches and a bandage is applied.

The sample is then sent to the laboratory for examination.



How to prepare for the test:

Tell your health care provider:

  • If you are pregnant
  • If you have any drug allergies
  • If you have bleeding problems
  • What medications you are taking (including any supplements or herbal remedies)

You must sign a consent form.



How the test will feel:

When the local anesthetic is injected, there will be a prick and a mild stinging. The biopsy site will be sore for a few days after the test.



Why the test is performed:

The test is used to help determine the cause ofswollen glands . It may be done to find out if a lymph node tumor is cancerous (malignant) or noncancerous (benign).



Normal Values:

Swollen lymph nodes may be caused by a number of conditions, ranging from very mild infections to cancer.



What abnormal results mean:

Abnormal results may be due to many different conditions, from very mild infections to cancer.

For example, enlarged lymph nodes may be due to:



What the risks are:
  • Bleeding
  • Infection
  • Nerve injury if the biopsy is done on a lymph node close to nerves


Special considerations:




Review Date: 8/22/2008
Reviewed By: Shimul A. Shah, MD, Assistant Professor of Surgery, University of Massachusetts Medical School, Worcester, MA. 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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