Thyroid cancer occurs in the cells of the thyroid — a butterfly-shaped gland located at the base of your neck, just below your Adam's apple. Your thyroid produces hormones that regulate your heart rate, blood pressure, body temperature and weight.

Thyroid cancer might not cause any symptoms at first. But as it grows, it can cause pain and swelling in your neck.

Several types of thyroid cancer exist. Some grow very slowly and others can be very aggressive. Most cases of thyroid cancer can be cured with treatment.

Symptoms:

• A lump (nodule) that can be felt through the skin on your neck
• Changes to your voice, including increasing hoarseness
• Difficulty swallowing
• Pain in your neck and throat
• Swollen lymph nodes in your neck

Causes

Thyroid cancer occurs when cells in your thyroid undergo genetic changes (mutations). The mutations allow the cells to grow and multiply rapidly. The cells also lose the ability to die, as normal cells would. The accumulating abnormal thyroid cells form a tumor. The abnormal cells can invade nearby tissue and can spread (metastasize) to other parts of the body.

Types of thyroid cancer

• Papillary thyroid cancer
• Follicular thyroid cancer
• Anaplastic thyroid cancer
• Medullary thyroid cancer

Risk factors

• Female sex. Thyroid cancer occurs more often in women than in men.
• Exposure to high levels of radiation. Radiation therapy treatments to the head and neck increase the risk of thyroid cancer.
• Certain inherited genetic syndromes. Genetic syndromes that increase the risk of thyroid cancer include familial medullary thyroid cancer, multiple endocrine neoplasia, Cowden's syndrome and familial adenomatous polyposis.

Complications

Thyroid cancer that comes back

Despite treatment, thyroid cancer can return, even if you've had your thyroid removed. This could happen if microscopic cancer cells spread beyond the thyroid before it's removed.

Thyroid cancer may recur in:

• Lymph nodes in the neck
• Small pieces of thyroid tissue left behind during surgery
• Other areas of the body, such as the lungs and bones

Prevention for people with a high risk

Adults and children with an inherited gene mutation that increases the risk of medullary thyroid cancer may consider thyroid surgery to prevent cancer (prophylactic thyroidectomy).

Conclusion

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Assistant Managing Editor
Journal of Molecular Oncology Research
Email: moloncol@eclinicalsci.org