A lymph node biopsy is the removal of lymph node tissue for examination under a microscope. The lymph nodes are small glands that make white blood cells (lymphocytes), which fight infection. Lymph nodes may trap the germs that are causing an infection. Cancer often spreads to lymph nodes. A lymph node biopsy is done in an operating room in a hospital. Or, it is done at an outpatient surgical center.
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