Cited by 88Thyroid Disorders and TreatmentsThyroid and Parathyroid SurgeryThyroid Cancer Diagnosis and Treatment

Natural history of subclinical hyperthyroidism in elderly patients with TSH between 0·1 and 0·4 mIU/l: a prospective study

Rosario, Pedro Weslley·2010·Clinical Endocrinology

Abstract

Summary: Context One important aspect in the decision to treat or not elderly patients with subclinical hyperthyroidism (SCH) is the risk of progression to overt hyperthyroidism (OH). Objective To define the natural history of endogenous SCH in elderly patients with TSH between 0·1 and 0·4 mIU/l. Design Prospective study. One hundred and two women aged ≥60 years with persistently low TSH ranging from 0·1 to 0·4 mIU/l and normal free T4 and T3 were studied. Patients using L‐T4 or antithyroid drugs, previously treated for hyperthyroidism, with pituitary disease, using corticosteroids, amiodarone, dopaminergic agonists, with atrial fibrillation or heart disease were excluded. Seven patients had Graves’ disease, 91 had nodular disease and 4 presented no defined cause. The time of follow‐up ranged from 12 to 70 months (median 41 months). Results Three patients progressed to OH (elevated T4 and/or T3) and four other patients to persistently low TSH (<0·1 mIU/l) in the presence of increase in serum T3 when compared with baseline. These patients were treated. Twenty‐four women presented sustained normalization of TSH and none progressed to hypothyroidism. SCH with TSH in the 0·1–0·4 mIU/l range persisted in 71 patients, 4 of them (5·6%) being treated because of the development of atrial fibrillation or heart disease during follow‐up. The only independent predictor of progression of SCH was an initial TSH value <0·2 mIU/l. Conclusions In elderly patients with endogenous SCH and TSH between 0·1 and 0·4 mIU/l progression to clinical hyperthyroidism is uncommon (approximately 1% per year), spontaneous TSH normalization may occur, and persistence of SCH for many years is the most likely.

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Crossref · 10.1111/j.1365-2265.2009.03696.x

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Authors
Rosario, P. W.
Venue
Clinical Endocrinology
Publisher
Wiley
Published
2010-03-25
Volume
72
Issue
5
Pages
685-688
ISSN
  • 0300-0664 (ISSN-L)
  • 1365-2265
OpenAlex
W2085643661
Cited by
88
References
26
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 6 · 2019: 5 · 2018: 10 · 2017: 9 · 2016: 4 · 2015: 5 · 2014: 3 · 2013: 8 · 2012: 13
FWCI
7.74
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Endocrinology (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 hyperthyroidism, natural history (disease), older women, thyroid-stimulating hormone, TSH normalization, hypothyroidism, atrial fibrillation, heart disease, thyroid nodules, Graves' disease, prognostic factors
MeSH terms
Aged, Female, Follow-Up Studies, Humans, Hyperthyroidism, Middle Aged, Predictive Value of Tests, Prospective Studies, Reference Values, Risk Factors, Thyrotropin, Thyroxine, Triiodothyronine, Disease Progression

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