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Related Concept Videos

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...
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...
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...
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...
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: Jun 6, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

[Diseases and medicaments underlying thyroid problems].

Niina Matikainen1

  • 1HUS:n endokrinologian klinikka, Peijaksen sairaala.

Duodecim; Laaketieteellinen Aikakauskirja
|December 4, 2010
PubMed
Summary

Thyroid function equilibrium can be disrupted by severe diseases or medications affecting the hypothalamus, pituitary, or thyroid gland. This can lead to permanent or transient thyroid dysfunction, necessitating careful monitoring of thyroid health.

Area of Science:

  • Endocrinology
  • Pharmacology
  • Internal Medicine

Context:

  • Thyroid function is sensitive to disruptions affecting the hypothalamic-pituitary-thyroid axis.
  • Severe illnesses and pharmacological interventions can significantly impair thyroid homeostasis.
  • Existing hypothyroidism or thyroid autoantibodies heighten susceptibility to drug-induced or disease-related thyroid disorders.

Purpose:

  • To review the impact of diseases and medications on thyroid function.
  • To highlight conditions and drugs that commonly disrupt thyroid equilibrium.
  • To emphasize the importance of monitoring thyroid function in specific clinical scenarios.

Summary:

  • Thyroid dysfunction can manifest as permanent hypo- or hyperthyroidism or transient thyroiditis.

Related Experiment Videos

Last Updated: Jun 6, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

  • Conditions affecting the hypothalamus, pituitary, or thyroid gland can disturb thyroid equilibrium.
  • Medications such as amiodarone, interferon, lithium, proton pump inhibitors, and tyrosine kinase inhibitors require thyroid function monitoring.

    • Impact:

    • Understanding these disruptions is crucial for managing patients on potentially thyroid-altering therapies.
    • Highlights the need for proactive thyroid function assessment in patients with predisposing factors.
    • Informs clinical practice regarding medication selection and monitoring protocols for thyroid health.