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HTDS Guide > Overview: About the Hanford Thyroid
Disease Study
HTDS Guide
About the Hanford Thyroid Disease Study
The Hanford Thyroid Disease Study (HTDS) is a scientific study
conducted to determine whether the risk of thyroid disease is increased
among people exposed to radioactive iodine (iodine-131) from the Hanford
Nuclear Site in Washington from 1944 through 1957.
The question was: "Did exposure to iodine-131 result in increased
incidence of thyroid disease?"
Study Focus – Iodine-131 was the primary source of radiation
for many people exposed to Hanford's radiation releases. Since
iodine-131 concentrates in the thyroid gland when it is inhaled or
consumed in contaminated food, the HTDS focused on thyroid disease.
Research Team – The HTDS was managed by the Centers for
Disease Control and Prevention (CDC), an agency in the U.S. Department
of Health and Human Services. The Fred Hutchinson Cancer Research Center
in Seattle, Washington conducted the scientific and technical work. The
HTDS Final Report was released in June 2002.
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