When is radioactive iodine treatment given?

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Radioactive iodine treatment (RAI treatment) is given to destroy thyroid tissue (especially for Graves' disease or thyroid cancer). The higher the dose, the greater the chance of developing hypothyroidism. However, even smaller doses can lead to hypothyroidism, just over a longer time period. Of note, diagnostic radioactive thyroid scans do not lead to hypothyroidism.

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