title: Controversies in thyroid function testing.
abstract: Thyroid function tests can be abnormal in certain patients in the absence of thyroid dysfunction. All thyroid function tests can be affected in these patients, including the free thyroxine assays and free thyroxine index. Familiarity with the conditions affecting thyroid function tests is necessary to avoid incorrect diagnosis and unnecessary testing.
mesh_terms: D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000175:diagnosis; D011247:Pregnancy; D013960:Thyroid Function Tests; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D013975:Thyroxine-Binding Proteins / Q000378:metabolism
chemical_list: D013975:Thyroxine-Binding Proteins; D013972:Thyrotropin; D013974:Thyroxine