Of 2,872 persons who had received radiation treatment in childhood because of an enlarged thymus, cancer of the thyroid developed in 24, and a benign thyroid tumor developed in 52. A comparison group consisted of 5,055 children who had received no such treatment (brothers and sisters of the children who had received radiation treatment).
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Answer: People who have received radiation treatment are 15 times more likely to develop benign thyroid tumors relative to does who have not.
New questions in Biology
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