Age and gender- Thyroid cancer present in any age group. Like any other cancer chances of getting thyroid cancer increases after 50 years. Incidence of thyroid cancer is higher in women than men.
Hereditary condition- Certain genetic conditions are associated with certain types of thyroid cancer like-MEN 2 syndrome is associated with increased risk of medullary carcinoma thyroid, Familial adenosis polyposis , Cowden syndrome are associated with increased risk of papillary and follicular type of thyroid cancer.
Family History- History of having thyroid cancer in first degree relatives like parents, siblings, children increase the risk of thyroid cancer. People having family history of thyroid cancer have increased risk of getting thyroid cancer.
Radiation Exposure- Radiation exposure in child hood for diseases like lymphoma, neuroblastoma etc can cause thyroid cancer later.
Low iodine- Low level of iodine in diet is found be related to occurrence of follicular and papillary thyroid cancer.