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Related Concept Videos

Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
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 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...
The Thyroid Gland01:23

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...
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...
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...

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Related Experiment Video

Updated: May 10, 2026

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
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Published on: February 9, 2024

Pitfalls in sonographic evaluation of thyroid abnormalities.

Bhavik N Patel1, Aya Kamaya, Terry S Desser

  • 1Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA.

Seminars in Ultrasound, CT, and MR
|June 18, 2013
PubMed
Summary
This summary is machine-generated.

Ultrasound effectively detects thyroid nodules, but careful interpretation is crucial to avoid misidentifying normal structures or other conditions. Key features like echogenicity and calcification aid in classifying nodules, guiding further diagnostic steps.

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Last Updated: May 10, 2026

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
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Point-of-Care Ultrasound: A Review of Ultrasound Parameters for Predicting Difficult Airways
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Point-of-Care Ultrasound: A Review of Ultrasound Parameters for Predicting Difficult Airways

Published on: April 7, 2023

Area of Science:

  • Radiology
  • Endocrinology
  • Pathology

Background:

  • Thyroid ultrasound is a primary diagnostic tool for evaluating thyroid nodules.
  • High-resolution ultrasound aids in nodule detection, but interpretation pitfalls exist.

Purpose of the Study:

  • To review the diagnostic utility and challenges of ultrasound in evaluating thyroid nodules.
  • To highlight sonographic features helpful in differentiating benign from malignant nodules.
  • To discuss pitfalls and mimics in thyroid nodule assessment.

Main Methods:

  • Review of existing literature on thyroid ultrasound.
  • Analysis of sonographic features associated with thyroid nodules.
  • Discussion of consensus guidelines for fine-needle aspiration.

Main Results:

  • Nodule size and number are unreliable predictors of malignancy.
  • Echogenicity, microcalcification, shape, and composition are helpful sonographic features.
  • Atypical presentations and diffuse thyroid diseases can mimic malignant nodules.

Conclusions:

  • A comprehensive approach using multiple sonographic features is necessary for accurate thyroid nodule classification.
  • Awareness of pitfalls and mimics is essential for correct diagnosis.
  • Ultrasound plays a vital role in post-thyroidectomy surveillance for disease recurrence.