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Natural history, diagnosis and management of subclinical thyroid dysfunction

Biondi, Bernadette·2012·Best Practice & Research Clinical Endocrinology & Metabolism

Abstract

Subclinical thyroid dysfunction (STD) represents a condition of slight thyroid hormone excess or deficiency, which may be associated with important adverse effects. This review will focus on the natural history, diagnosis and management of subclinical thyroid dysfunction. Since STD is only detected as a thyroid stimulating hormone (TSH) abnormality, it is essential to exclude transient causes of abnormal serum TSH before treating this disorder. Treatment of subclinical hyperthyroidism (SHyper) is recommended in elderly patients with undetectable serum TSH for the increased risk of atrial fibrillation, osteoporosis and bone fractures and for the higher risk of progression to overt disease. Treatment of subclinical hypothyroidism should be considered in patients with serum TSH above 10 mU/L for the increased risk of progression to overt hypothyroidism and the increased risk of coronary heart disease and heart failure events, which have been documented in patients with TSH increase above 10 mU/L. About 75% of patients with STD have mild dysfunction. The mild form of STD (low but detectable serum TSH in SHyper and mild increased serum TSH between 5 and 9 mU/L in SHypo is associated with a minor risk of disease progression to overt dysfunction. The best treatment for STD remains controversial. Treatment of the mild form of STD should be considered after evaluating the patients' age, the adverse risk factors, the potential beneficial effects of treating this disorder and any underlying co-morbidities. Mild SHypo should be treated in infertile and pregnant women.

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Crossref · 10.1016/j.beem.2011.12.004

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Authors
Biondi, B.
Affiliations
Federico II University Hospital (IT)
Corresponding author
Biondi, Bernadette
Venue
Best Practice & Research Clinical Endocrinology & Metabolism
Publisher
Elsevier BV
Published
2012-08
Volume
26
Issue
4
Pages
431-446
ISSN
1521-690X (ISSN-L)
OpenAlex
W2129395029
Cited by
98
References
120
Citations by year
2025: 2 · 2024: 5 · 2023: 3 · 2022: 6 · 2021: 9 · 2020: 7 · 2019: 13 · 2018: 3 · 2017: 8 · 2016: 3 · 2015: 12 · 2014: 12 · 2013: 11 · 2012: 2
FWCI
1.64
Type
journal article
Language
en
Open access
closed
Locations
  • Best Practice & Research Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Surgery › Thyroid and Parathyroid Surgery
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Cancer Diagnosis and Treatment
Keywords
subclinical thyroid dysfunction, subclinical hyperthyroidism, subclinical hypothyroidism, thyroid-stimulating hormone, natural history (disease), disease progression, overt hypothyroidism, overt hyperthyroidism, atrial fibrillation, osteoporosis, coronary artery disease, heart failure, treatment thresholds, pregnancy, infertility
MeSH terms
Humans, Thyroid Diseases, Thyroid Function Tests, Thyrotropin, Thyroxine, Triiodothyronine

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