RT Journal Article
SR Electronic
T1 Approach to a low TSH level: Patience is a virtue
JF Cleveland Clinic Journal of Medicine
JO Cleve Clin J Med
FD Cleveland Clinic
SP 803
OP 811
DO 10.3949/ccjm.77a.10056
VO 77
IS 11
A1 Kevin M. Pantalone
A1 Christian Nasr
YR 2010
UL http://www.ccjm.org/content/77/11/803.abstract
AB Confronted with a low serum level of thyrotropin (thyroid- stimulating hormone, TSH), physicians should not jump to the conclusion that it is due to a hyperthyroid state, as other conditions and some drugs can be associated with a TSH level that is slightly low (0.1–0.4 μIU/mL) or frankly suppressed (< 0.1 μIU/mL). This review discusses how to approach a low TSH, stressing the frequent need to reassess thyroid function before making a diagnosis, the underlying processes and the drugs that can be responsible, and the degree of TSH suppression and its role in the evaluation.