Thyroid Examination: Purpose and Coverage

It has been reported that cases of thyroid cancer increased among children after the Chernobyl accident due to internal exposure to radioactive iodine. Compared with the Chernobyl accident, the amount of radioactive materials discharged into the environment after the accident in Fukushima was much smaller and estimated internal and external doses of the residents were even smaller. Therefore, it is predicted that there would be no epidemiologically detectable thyroid health risks. However, as concerns remain about effects of radiation due to the accident on children's thyroid glands, the Thyroid Examination has been continued under the framework of the Fukushima Health Management Survey with the aim of ascertaining children's current thyroid status and promoting their health into the future.

• Included in this reference material on March 31, 2013
• Updated on March 31, 2017