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Related Concept Videos

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...
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...
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...
Goiter01:27

Goiter

Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...

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Related Experiment Video

Updated: May 22, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Bone disease in thyrotoxicosis.

P Amaresh Reddy1, C V Harinarayan, Alok Sachan

  • 1Department of Endocrinology & Metabolism, Sri Venkateswara Institute of Medical Sciences, Tirupati, India.

The Indian Journal of Medical Research
|May 8, 2012
PubMed
Summary
This summary is machine-generated.

Thyrotoxicosis accelerates bone remodelling and increases osteoporosis risk. Treatment reverses bone loss and reduces fracture risk, but reversibility in India needs more study.

Related Experiment Videos

Last Updated: May 22, 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:

  • Endocrinology
  • Bone Metabolism
  • Mineral Metabolism

Background:

  • Thyrotoxicosis, a condition of excess thyroid hormone, accelerates bone remodelling.
  • It is a known risk factor for osteoporosis, yet its specific metabolic effects on bone are not fully understood.
  • Thyroid hormones impact bone health both in laboratory (in vitro) and living organism (in vivo) studies.

Purpose of the Study:

  • To review the effects of thyrotoxicosis on bone and mineral metabolism.
  • To examine the impact of subclinical thyrotoxicosis on bone and mineral metabolism.
  • To assess the effectiveness of various treatments in improving bone mineral density in thyrotoxicosis patients.

Main Methods:

  • Literature review of studies on thyrotoxicosis and bone metabolism.
  • Analysis of endogenous and exogenous thyrotoxicosis effects.
  • Evaluation of treatment outcomes on bone mineral density.

Main Results:

  • Thyrotoxicosis accelerates bone remodelling, increasing osteoporosis and fracture risk.
  • Treatment of thyrotoxicosis can reverse bone loss and metabolic changes.
  • Limited data exists on the full reversibility of these changes in the Indian population.

Conclusions:

  • Thyrotoxicosis significantly impacts bone and mineral metabolism.
  • Treatment is effective in mitigating negative bone effects.
  • Further research is needed in India to confirm the complete reversibility of bone changes.