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Thyroid disease and its treatment: short- and long-term consequences
1Department of Medicine, University of Birmingham, Queen Elizabeth Hospital, Edgbaston. j.a.franklyn@bham.ac.uk
Journal of the Royal College of Physicians of London
|January 14, 2000
Summary
Thyroid dysfunction, including hyperthyroidism and hypothyroidism, can lead to long-term health issues such as cardiovascular mortality and osteoporosis. Treatment risks, like radioiodine therapy, are minimal, with no overall cancer increase observed.
Area of Science:
- Endocrinology
- Internal Medicine
- Public Health
Background:
- Thyroid dysfunction affects up to 5% of the population, encompassing hyperthyroidism and hypothyroidism.
- Short-term effects are recognized, but emerging evidence highlights long-term morbidity and mortality risks.
- Both overt and subclinical thyroid dysfunction may be linked to adverse long-term health outcomes.
Purpose of the Study:
- To review the long-term consequences of thyroid dysfunction.
- To assess the risks associated with treatments for thyroid disease, particularly radioiodine therapy.
- To investigate the association between thyroid dysfunction and cardiovascular, cerebrovascular, and bone health.
Main Methods:
- Literature review of studies on thyroid dysfunction and its long-term effects.
- Analysis of data regarding cardiovascular and cerebrovascular mortality in patients with previous thyrotoxicosis.
- Examination of fracture risk, specifically osteoporotic femur fractures.
- Investigation of cancer risk following radioiodine treatment for hyperthyroidism.
Main Results:
- Increased cardiovascular and cerebrovascular mortality observed in individuals with a history of thyrotoxicosis treated with radioiodine.
- Elevated risk of osteoporotic femur fractures in patients with previous thyrotoxicosis.
- Subclinical hyperthyroidism is associated with an increased risk of atrial fibrillation.
- Radioiodine therapy for hyperthyroidism shows no significant increase in overall cancer risk or mortality, with a minor potential increase in thyroid cancer risk possibly linked to the underlying condition.
Conclusions:
- Thyroid dysfunction poses significant long-term health risks, including cardiovascular events and bone fractures.
- While radioiodine therapy is generally safe regarding cancer risk, careful monitoring is warranted.
- Further research into the long-term implications of subclinical thyroid dysfunction is essential for comprehensive patient management.
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