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Hyperthyroidism I: Introduction

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: Pathophysiology

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...

Graves Disease II: Pathophysiology

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: Introduction

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...

Hypothyroidism II: Pathophysiology

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...

The Thyroid Gland

The Thyroid Gland

The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...

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Related Experiment Video

Updated: May 7, 2026

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

Published on: October 6, 2023

[Hyperthyroidism in molar pregnancy].

H Boufettal¹, S Mahdoui¹, M Noun¹

¹Service de gynécologie-obstétrique « C », faculté de médecine et de pharmacie, université Ain Chok, centre hospitalier universitaire Ibn Rochd, Casablanca, Maroc.

La Revue De Medecine Interne

|October 1, 2013

Summary

This summary is machine-generated.

Molar pregnancy can cause hyperthyroidism due to hormonal changes. Prompt diagnosis and treatment, such as uterine evacuation, are crucial for recovery.

Keywords:

Gestational trophoblastic disease Grossesse molaire Hormone chorionique gonadotrophique Human gonadotrophin chorinic Hyperthyroidism Hyperthyroïdie Maladie gestationnelle trophoblastique Molar pregnancy Sialysation Thyrotoxicose Thyrotoxicosis

Related Experiment Videos

Last Updated: May 7, 2026

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

Published on: October 6, 2023

Area of Science:

Endocrinology
Obstetrics & Gynecology
Reproductive Medicine

Background:

Hyperthyroidism is an uncommon complication associated with molar pregnancy.
Gestational trophoblastic diseases can lead to significant hormonal imbalances.
Understanding the endocrine impact of molar pregnancies is vital.

Observation:

A case report details a 39-year-old woman with thyrotoxic syndrome linked to molar pregnancy.
Elevated serum thyroid hormones normalized post-uterine evacuation.
The study highlights the thyroid-stimulating properties of human chorionic gonadotropin.

Findings:

Structural changes in human chorionic gonadotropin during molar pregnancy confer thyroid-stimulating properties.
Molar pregnancy is identified as a potential cause of hyperthyroidism.
Thyrotoxicosis symptoms can manifest during molar pregnancy.

Implications:

Molar pregnancy should be considered in the differential diagnosis of thyrotoxic syndrome in women of reproductive age.
Early recognition of molar pregnancy is essential for managing associated hyperthyroidism.
This association underscores the importance of interdisciplinary care in reproductive endocrinology and thyroid disorders.