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The symptoms of a head and neck cancer will depend on where it is – for example, cancer of the tongue may cause some slurring of speech.
An important common symptom of cancers of the head and neck is swelling of one or more of the lymph glands in the neck.
The lymph glands (also known as lymph nodes) form part of the lymphatic system, which is the body's natural defence against infection. They contain white blood cells that help to fight infection and disease. Lymph glands occur throughout the body but can sometimes be felt as tiny pea-sized lumps in the neck, under the armpits and in the groin.
Diagram of the lymphatic system in the upper body
Cancers in any part of the body can spread into nearby lymph glands. This is particularly common with head and neck cancers, where the lymph glands in the neck can become enlarged. Sometimes the first symptom of a head and neck cancer will be a painless enlargement of one of these glands.
Enlarged lymph glands are much more likely to be due to a harmless infection than to cancer. However, if a lump stays for more than 3–4 weeks, despite a course of antibiotics, it should be examined by a specialist.
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