Ron E, Brenner A. Non-malignant thyroid diseases after a wide range of radiation exposures. Radiat Res. 2010 Dec;174(6):877-88.

The aim of this review is to evaluate the effects of high and low dose radiation on benign structural and functional diseases of the thyroid. Following a wide range of doses of ionizing radiation, an increased risk of thyroid adenomas and nodules was observed in a variety of populations and settings. The dose response appeared to be linear at low to moderate doses, but in one study there was some suggestion of a reduction in risk above 5 Gy. The elevated risk for benign tumors continues for decades following exposure. In general, associations for these outcomes were fairly weak and significant radiation effects were most often observed following high doses, particularly for hypothyroidism.

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