![]() Lymph fluid, which contains white blood cells to fight infection, travels through lymph vessels. There are approximately 800 lymph nodes scattered throughout your body, with more than a third located in the head and neck. It’s a network of lymph vessels and lymph nodes. The lymph system is part of the immune system. The tissue samples will go to a laboratory where a pathologist will use a microscope to look for cancer cells.Ī biopsy often follows a cancer diagnosis, even if the lymph nodes appear normal. This can be done with a needle, or the lymph nodes can be removed during surgery.
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