RT Journal Article SR Electronic T1 Subclinical hyperthyroidism: to treat or not to treat? JF Postgraduate Medical Journal JO Postgrad Med J FD The Fellowship of Postgraduate Medicine SP 394 OP 398 DO 10.1136/pgmj.2003.017095 VO 80 IS 945 A1 Hoogendoorn, E H A1 den Heijer, M A1 van Dijk, A P J A1 Hermus, A R YR 2004 UL http://pmj.bmj.com/content/80/945/394.abstract AB Subclinical hyperthyroidism may be defined as the presence of free thyroxine and tri-iodothyronine levels within the reference range and a reduced serum thyroid stimulating hormone (TSH) level. In this review the prevalence of low TSH in the population and health consequences of subclinical hyperthyroidism, for example, effects on heart and bone mass, are discussed. Guidelines for treatment are given, based on expert opinion.