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In most people, thyroid cancer develops very slowly.
Possible symptoms can be one or more of the following:
It’s unusual for thyroid cancer to affect the level of thyroid hormones (T3| and T4|) in the blood, so symptoms of an over- or under-active thyroid are uncommon.
If you notice a lump in your neck, or any of the above symptoms, you should see your doctor as soon as possible. However, most thyroid swellings (or goitres) are benign (non-cancerous).
Content last reviewed: 1 December 2012
Next planned review: 2014
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© Macmillan Cancer Support 2013
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