Many people have no risk factors for thyroid cancer but develop it anyway. That's why this cancer usually can't be prevented.
However, genetic blood tests can be used to identify people who have a high risk of developing the familial types of MTC. When inherited MTC strikes one family member, all family members can be tested. Those who test positive but have no symptoms of thyroid cancer may decide to have their thyroid removed to prevent the disease. After surgery, these patients need to take thyroid hormones for the rest of their lives.
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