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elevated TSH and low FT4 levels: overt hypothyroidism. low TSH and elevated FT4: overt hyperthyroidism. elevated TSH and normal FT4: subclinical hypothyroidism. low TSH and normal FT4: subclinical hyperthyroidism. Bibliography References: 1.Helfand M, Redfern C. Screening for Thyroid Disease :an update . Annal of Intern Med 129, 2, 144-158,1998 ... ................
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