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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...

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.
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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...

Synthesis and Regulation of Thyroid Hormones

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Graves' Disease I: Introduction

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Hyperthyroidism I: Introduction

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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...

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Related Experiment Video

Updated: Jun 10, 2026

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer

Published on: June 9, 2023

2009 American Thyroid Association guidelines on thyroid nodules.

¹Department of Endocrinology, Royal Victoria Infirmary, Newcastle upon Tyne, UK. petros.perros@nuth.nhs.uk

Clinical Oncology (Royal College of Radiologists (Great Britain))

|July 24, 2010

Summary

The 2009 American Thyroid Association guidelines offer recommendations for thyroid nodules and differentiated thyroid cancer. Clinicians should critically evaluate guideline applicability due to evolving evidence and practice variations.

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Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer

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A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images

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Area of Science:

Endocrinology
Oncology

Background:

The 2009 American Thyroid Association (ATA) guidelines provide evidence-based recommendations for managing thyroid nodules and differentiated thyroid cancer.
Clinical practice faces ongoing challenges due to controversies and uncertainties in thyroid nodule and cancer management.

Purpose of the Study:

To highlight the value of the 2009 ATA guidelines.
To underscore the need for critical appraisal of guideline recommendations.

Main Methods:

Review of existing evidence and clinical consensus regarding thyroid nodules and differentiated thyroid cancer.
Analysis of factors influencing guideline implementation.

Main Results:

The 2009 ATA guidelines offer valuable recommendations for thyroid nodules and differentiated thyroid cancer.
Evidence gaps and clinical uncertainties persist, requiring careful consideration.

Conclusions:

Clinicians must be aware of potential pitfalls when transferring guidelines to practice.
Pre-existing practices and national healthcare structures can influence guideline interpretation and application.