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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

Synthesis and Regulation of Thyroid Hormones

Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...

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...

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...

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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Updated: Jul 10, 2026

Spontaneous Murine Model of Anaplastic Thyroid Cancer

Spontaneous Murine Model of Anaplastic Thyroid Cancer

Published on: February 3, 2023

Circulating thyroid cancer markers.

Manjula Gupta¹, Su-Ynn Chia

¹Dept of Clinical Pathology, Cleveland Clinic, Cleveland, Ohio 44195, USA. guptam@ccf.org

Current Opinion in Endocrinology, Diabetes, and Obesity

|October 18, 2007

Summary

This summary is machine-generated.

Circulating thyroid-specific messenger RNA (mRNA) shows promise for detecting thyroid cancer. Thyroid-stimulating hormone receptor mRNA is a sensitive and specific marker for recurrent disease, aiding in diagnosis and potentially avoiding unnecessary surgeries.

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In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice

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Published on: August 23, 2019

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Spontaneous Murine Model of Anaplastic Thyroid Cancer

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Published on: February 3, 2023

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice

Published on: August 23, 2019

Area of Science:

Oncology
Molecular Diagnostics
Biomarker Research

Background:

Thyroid cancer diagnosis and monitoring rely on current methods like fine-needle aspiration and serum thyroglobulin, which have limitations.
Recurrent or residual thyroid cancer detection is challenging, especially with antithyroglobulin antibodies present.
There is a need for more sensitive and specific circulating markers for thyroid cancer management.

Purpose of the Study:

To review the advancements in circulating markers for thyroid cancer detection and monitoring.
To evaluate the diagnostic utility of thyroid-specific gene mRNA in blood.
To assess the potential of novel markers in improving thyroid cancer management.

Main Methods:

Detection of circulating tumor cells by measuring mRNA of thyroid-specific genes.
Analysis of thyroglobulin mRNA and thyroid-stimulating hormone receptor mRNA.
Comparison of mRNA marker performance with existing diagnostic modalities.

Main Results:

Thyroid-specific gene mRNA, particularly thyroglobulin and thyroid-stimulating hormone receptor mRNA, demonstrates high diagnostic sensitivity and specificity.
Thyroid-stimulating hormone receptor mRNA shows high sensitivity and specificity for detecting recurrent/residual disease, even with antithyroglobulin antibodies.
Thyroid-stimulating hormone receptor mRNA measurement may improve cancer detection in cases of indeterminate fine-needle aspiration cytology.

Conclusions:

Thyroid-specific mRNA markers offer a promising approach for thyroid cancer detection and monitoring.
Thyroid-stimulating hormone receptor mRNA is a valuable biomarker for recurrent/residual thyroid cancer, outperforming serum thyroglobulin in certain scenarios.
Measurement of thyroid-stimulating hormone receptor mRNA could enhance the diagnostic accuracy for indeterminate thyroid nodules, potentially reducing unnecessary surgeries.