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What causes the T3 and T4 levels to increase?

April 26, 2017causes increase levels T3 T4

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What causes the T3 and T4 levels to increase?

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The thyroid levels increase due to a tumor, most often benign (96-97%) that is associated with the thyroid gland. This tumor secretes thyroid hormone and does not respond to the normal signals of the body to stop producing and releasing this hormone in spite of adequate levels.