Cited by 1,418Thyroid Disorders and TreatmentsThyroid and Parathyroid SurgeryThyroid Cancer Diagnosis and Treatment

The Clinical Significance of Subclinical Thyroid Dysfunction

Biondi, Bernadette, Cooper, David S.·2008·Endocrine Reviews

Abstract

Subclinical thyroid disease (SCTD) is defined as serum free T(4) and free T(3) levels within their respective reference ranges in the presence of abnormal serum TSH levels. SCTD is being diagnosed more frequently in clinical practice in young and middle-aged people as well as in the elderly. However, the clinical significance of subclinical thyroid dysfunction is much debated. Subclinical hyper- and hypothyroidism can have repercussions on the cardiovascular system and bone, as well as on other organs and systems. However, the treatment and management of SCTD and population screening are controversial despite the potential risk of progression to overt disease, and there is no consensus on the thyroid hormone and thyrotropin cutoff values at which treatment should be contemplated. Opinions differ regarding tissue effects, symptoms, signs, and cardiovascular risk. Here, we critically review the data on the prevalence and progression of SCTD, its tissue effects, and its prognostic implications. We also examine the mechanisms underlying tissue alterations in SCTD and the effects of replacement therapy on progression and tissue parameters. Lastly, we address the issue of the need to treat slight thyroid hormone deficiency or excess in relation to the patient's age.

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Crossref · 10.1210/er.2006-0043

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Authors
Biondi, B., & Cooper, D. S.
Affiliations
  • University of Naples Federico II (IT)
  • Johns Hopkins University (US)
Venue
Endocrine Reviews
Published
2007-11-08
Volume
29
Issue
1
Pages
76-131
ISSN
  • 0163-769X (ISSN-L)
  • 1945-7189
OpenAlex
W2043015190
Cited by
1,418
References
539
Citations by year
2026: 58 · 2025: 62 · 2024: 55 · 2023: 63 · 2022: 83 · 2021: 70 · 2020: 75 · 2019: 83 · 2018: 83 · 2017: 87 · 2016: 85 · 2015: 81 · 2014: 82 · 2013: 96 · 2012: 101
FWCI
8.61
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrine Reviews (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, free thyroxine, free T3, cardiovascular risk, bone metabolism, thyroid hormone replacement, thyroid screening, tissue effects
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Aging, Calcification, Physiologic, Cardiovascular Diseases, Child, Child, Preschool, Cognition, Diagnosis, Differential, Humans, Hyperthyroidism, Hypothalamus, Hypothyroidism, Infant, Infant, Newborn, Middle Aged, Pituitary Gland, Quality of Life, Reference Values, Risk Factors, Thyroid Diseases, Thyroid Gland, Thyrotropin, Thyroxine, Triiodothyronine, Neonatal Screening, MEDLINE

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