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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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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...
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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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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Related Experiment Video

Updated: Mar 19, 2026

Author Spotlight: Integrating Ultrasound Imaging with Biochemical Markers for Thyroid Disease Diagnosis
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Thyroid hormone testing in the 21st century.

Ravinder J Singh1, Parmpreet Kaur2

  • 1Lab Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.

Clinical Biochemistry
|June 23, 2016
PubMed
Summary
This summary is machine-generated.

Accurate thyroid hormone measurement is crucial for managing thyroid dysfunction. While immunoassays are common, liquid chromatography-mass spectrometry (LC-MS) offers superior specificity and accuracy for thyroid testing.

Keywords:
ImmunoassaysLC-MS/MSThyroid

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Area of Science:

  • Clinical chemistry and diagnostics
  • Endocrinology and metabolism

Background:

  • Accurate thyroid hormone measurement is essential for diagnosing and managing thyroid dysfunction, particularly in outpatient settings.
  • Current immunoassays, while accessible, suffer from limitations in accuracy, sensitivity, and specificity, impacting patient care.
  • The need for rapid, cost-effective, and widely available thyroid testing persists, with no point-of-care alternatives yet replacing centralized methods.

Discussion:

  • Mass spectrometry (MS) assays offer higher specificity but are often labor-intensive and require expensive equipment and technical expertise, limiting widespread adoption.
  • Standardization issues and performance differences among existing thyroid assays create challenges for clinicians in selecting appropriate tests.
  • Technological advancements and automation solutions are improving workflow and decentralizing thyroid testing accessibility in hospital laboratories.

Key Insights:

  • Liquid chromatography-mass spectrometry (LC-MS) is emerging as a superior alternative to immunoassays due to its enhanced specificity and accuracy.
  • Ongoing development of performance standards and automated platforms aims to address the limitations of current thyroid testing methods.
  • Despite advancements, clinicians face complexity in choosing the right assay for diverse clinical scenarios.

Outlook:

  • As LC-MS technology becomes more accessible and standardized, it is poised to become the preferred method for thyroid hormone measurement.
  • Continued innovation in automation and assay development will further improve the efficiency and reliability of thyroid testing.
  • The trend towards decentralization and improved accessibility will enhance thyroid disorder management globally.