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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...

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 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...

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...

Goiter

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 31, 2026

Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration

Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration

Published on: November 10, 2014

Primary echinococcus cyst of the thyroid: a case report.

Ismet Ozaydin¹, Cigdem Ozaydin, Sukru Oksuz

¹Department of General Surgery, School of Medicine, Duzce, Turkey. drcozaydin@hotmail.com

Acta Medica Iranica

|June 30, 2011

Summary

Cystic echinococcosis, a parasitic infection, rarely affects the thyroid gland. This case report details a unique instance of a solitary hydatid cyst found in a young male

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Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

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Published on: May 12, 2023

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Last Updated: May 31, 2026

Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration

Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration

Published on: November 10, 2014

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

Published on: May 12, 2023

Area of Science:

Endocrinology
Parasitology
Public Health

Background:

Echinococcosis remains a significant public health issue in agricultural communities.
Cystic hydatidosis commonly affects the liver and lungs, with rare occurrences in other organs.
Thyroid gland involvement by hydatid cysts is exceptionally uncommon.

Observation:

A 25-year-old male presented with a solitary goiter.
Initial laboratory tests and thyroid function profiles were within normal limits.
Surgical intervention identified a hydatid cyst within the left lobe of the thyroid gland.

Findings:

The examination confirmed a solitary primary hydatid cyst of the thyroid.
This represents a rare manifestation of echinococcosis.

Implications:

Highlights the importance of considering rare diagnoses in endemic regions.
Underscores the need for awareness among clinicians regarding ectopic parasitic infections.
Contributes to the limited literature on thyroid echinococcosis, aiding future diagnostic and treatment strategies.