Back in November I posted this blog:
Same authors have now posted a review article all about TSH. Well worth reading - and the full paper is available for free. Some of it very much agrees with what many here regularly say - e.g. that TSH is being misused and misunderstood.
Journal of Thyroid Research
Volume 2012 (2012), Article ID 438037, 9 pages
TSH Measurement and Its Implications for Personalised Clinical Decision-Making
Rudolf Hoermann1 and John E. M. Midgley21Department of Nuclear Medicine, Klinikum Luedenscheid, Paulmannshoeherstraße 14, 58515 Luedenscheid, Germany
AbstractAdvances in assay technology have promoted thyrotropin (TSH) measurements from participation in a multi-analyte assessment of thyroid function to a statistically defined screening parameter in its own right. While this approach has been successful in many ways, it has some grave limitations. This includes the basic question of what constitutes an agreed reference range and the fact that the population-based reference range by far exceeds the variation of the intraindividual set point. Both problems result in a potential misdiagnosis of normal and pathological thyroid function in a substantial proportion of patients. From a physiological perspective, TSH plays an integrated role in thyroid homeostasis. Few attempts have been made to adopt physiological insights into thyroid homeostasis for medical decision-making. Some emerging novel findings question the widely assumed log-linear TSH-FT4 relationship over the entire thyroid function spectrum. This data favours more complex hierarchically structured models. With a better understanding of its role in thyroid homeostasis in thyroid health and disease, TSH can be revisited in the context of thyroid regulation. This, in turn, could help overcome some of the limitations arising from its isolated statistical use and offer new prospects towards a more personalised interpretation of thyroid test results.
<full article available for free at link>
Rudolf Hoermann and John E. M. Midgley, “TSH Measurement and Its Implications for Personalised Clinical Decision-Making,” Journal of Thyroid Research, vol. 2012, Article ID 438037, 9 pages, 2012. doi:10.1155/2012/438037