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Related Concept Videos

Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...

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Related Experiment Video

Updated: May 8, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

The aging thyroid.

Vafa Tabatabaie1, Martin I Surks

  • 1Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467, USA. vtabatab@montefiore.org

Current Opinion in Endocrinology, Diabetes, and Obesity
|August 27, 2013
PubMed
Summary
This summary is machine-generated.

Diagnosing thyroid dysfunction in older adults requires caution. Recent studies show thyroid-stimulating hormone (TSH) levels naturally increase with age, and the effects of subclinical thyroid issues in the elderly are still unclear.

Related Experiment Videos

Last Updated: May 8, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Area of Science:

  • Geriatric Medicine
  • Endocrinology
  • Internal Medicine

Background:

  • Increasing life expectancy necessitates a focus on geriatric health.
  • Thyroid dysfunction diagnosis in the elderly is complicated by age-specific reference ranges for thyroid-stimulating hormone (TSH).
  • Subclinical thyroid dysfunction presents diagnostic challenges in aging populations.

Purpose of the Study:

  • To review recent literature on diagnosing and treating thyroid dysfunction in the geriatric population.
  • To highlight the complexities introduced by age-specific TSH reference ranges.
  • To emphasize the need for caution in diagnosing and treating elderly patients with thyroid disorders.

Main Methods:

  • Review of recent scientific literature on thyroid dysfunction in the elderly.
  • Analysis of studies examining age-specific TSH distribution.
  • Evaluation of evidence regarding consequences of subclinical thyroid dysfunction in older adults.

Main Results:

  • Recent studies confirm an age-related increase in TSH distribution.
  • Evidence for adverse cardiovascular, metabolic, or cognitive effects of subclinical hypothyroidism in the elderly is inconclusive.
  • Thyroid dysfunction in the elderly is often transient.

Conclusions:

  • Caution is advised before diagnosing hypothyroidism or hyperthyroidism in elderly patients.
  • Initiation of thyroid treatment in the elderly requires careful consideration due to potential long-lasting effects.
  • Further research is needed to clarify the clinical significance of subtle thyroid dysfunction in older adults.