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Could X-rays, mammograms be linked to rising thyroid cancer rates?

The incidence of many cancers is decreasing, but thyroid cancer is on the rise. Popular television host Dr. Oz this week suggested the increase could be linked to excessive use of dental X-rays and mammograms. Risk factors for thyroid cancer include hereditary conditions and iodine deficiency, though the latter is rare in the United States because of iodized salts. Thyroid cancer is also four times more likely to occur in women than men, leading some to suggest that estrogen might fuel the growth of thyroid cancer. (Estrogen is also linked to some types of breast cancer.) Another leading risk factor for ... Read More