Hypofunction of the thyroid gland

Hypothyroidism is a clinical syndrome that develops due to the deficiency of thyroid hormones. According to the pathogenesis, hypothyroidism can be primary (due to the pathology of the thyroid gland it self) and secondary (due to TSH deficiency) (Table1), while more 99% of cases account for primary acquired hypothyroidism). Hypothroidism developed as aresult of chronic autoimmune throiditis (AIT) has the greatest clinical significance, and also, iatrogenis hypothyroidism