Which complications of hypothyroidism may occur in untreated infants?

Updated: Mar 03, 2021
  • Author: Philip R Orlander, MD, FACP; Chief Editor: George T Griffing, MD  more...
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Because most brain growth occurs in the first 2 years of life, untreated hypothyroidism in infants can cause irreversible mental retardation. Older infants are spared nervous system damage but continue to have slowed physical and linear bone growth. They also have delayed dental development.

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