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What is Lymph Nodes in Neck cancer? What Is Symptoms of Lymph Node Cancer? The lymph nodes in the neck aren’t the only ones in the body. Lymph nodes may be found all over the body. Their primary function is to catch and filter foreign chemicals that enter the body so that you do not become ill. Having said that, lymph nodes are an important aspect of the body’s immune system. Your biological soldiers—white blood cells—are kept in them. Let’s look at some of the reasons cervical lymph nodes enlarge. Common illnesses such as sore throats, colds, tonsillitis, strep throat, and TB can all cause the disease. It’s also possible that bacterial and viral illnesses play a role. Swelling can also be caused by epiglottitis, an inflammation of the flap at the base of the tongue.