Abstract

Thyroid hormones have an important role on the central nervous system, growth, development, body temperature regulation, metabolism of lipid, carbohydrate and energy, musculoskeletal system. The other hand, it has a different importance for its role in the myelinization of the central nervous system during the childhood period. Subclinical hypothyroidism (SH), is diagnosed when peripheral thyroid hormone levels are within normal reference laboratory range but serum thyroid-stimulating hormone levels are mildly elevated. Prevalance of subclinical hypothyroidism in chilhood is seen about %2. The majority of its etiology is due to the autoimmune thyroiditis and iodine deficiency. It is important to diagnose and treat the asymptomatic cases in a timely manner. Thyroxin treatment should be started if goiter, growth velocity is slowed down, decline in school success, negativism, depression, obesity, refractory iron deficiency anemia dyslipidemia, bone age retardation.

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