Congenital hypothyroidism laboratory findings

Congenital hypothyroidism Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Laboratory Findings

In the developed world, nearly all cases of congenital hypothyroidism are detected by the newborn screening program. These are based on measurement of TSH or thyroxine (T₄) on the second or third day of life. If the TSH is high, or the T₄ low, the infant's doctor and parents are called and a referral to a pediatric endocrinologist is recommended to confirm the diagnosis and initiate treatment.