Hypothyroidism - Complications

Effects of Childhood-Onset Hypothyroidism. If hypothyroidism develops in children older than two years, mental retardation is not a danger, but physical growth may be slowed and new teeth delayed. If treatment is delayed, adult growth could be affected. Even with treatment, some children with severe hypothyroidism may have attention problems and hyperactivity.

Effects of Hypothyroidism and Childhood X-Ray Treatments

Two million Americans, mostly children, received x-ray treatments to the head or neck between 1920 and 1960 for acne, enlarged thymus gland, recurrent tonsillitis, or chronic ear infections. The risk of developing thyroid nodules and thyroid cancers is increased in these individuals. Cancer can develop as late as 40 years after the original treatment. This risk is increased in people who develop hypothyroidism. Everyone who has had head and neck radiation should be sure to have their thyroid glands examined regularly.

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