Affiliation:
1. First Moscow State Medical University named after I.M. Sechenov
Abstract
Secondary hypothyroidism is a very rare cause of hypothyroidism in adults. Clinical manifestations of secondary as well as primary hypothyroidism are nonspecific; in addition, thyroid hormone deficiency often clinically simulates other tropic hormone deficiencies, thus complicating timely diagnosis of the disease. Certain difficulties are also caused by replacement therapy in secondary hypothyroidism, since the level of free thyroxine in the blood is used as the criterion for evaluating levothyroxine dosage, and questions about the use of peripheral markers of thyroid function to assess the adequacy of therapy remain understudied.