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Related Concept Videos

The Parathyroid Glands00:59

The Parathyroid Glands

The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
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...
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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: 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...
Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
Graves Disease II: Pathophysiology01:24

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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 19, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
03:57

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

Published on: July 14, 2023

Hypoparathyroidism.

Hafsah Al-Azem1, Aliya A Khan

  • 1McMaster University, 1101-75 Bold St, Hamilton, Ontario L8P 1T7, Canada.

Best Practice & Research. Clinical Endocrinology & Metabolism
|August 7, 2012
PubMed
Summary
This summary is machine-generated.

Hypoparathyroidism causes low calcium and high phosphate due to insufficient parathyroid hormone (PTH). Treatment involves calcium, vitamin D, and sometimes PTH replacement for calcium homeostasis.

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Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
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Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation

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Published on: July 14, 2023

Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
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Area of Science:

  • Endocrinology
  • Metabolic Disorders

Background:

  • Hypoparathyroidism is a condition marked by low calcium (hypocalcemia) and high phosphate (hyperphosphatemia) due to inadequate parathyroid hormone (PTH) levels.
  • Pseudohypoparathyroidism shares these biochemical findings but involves elevated PTH due to resistance.
  • PTH is crucial for calcium and phosphate balance, influencing vitamin D-dependent calcium absorption, kidney calcium reabsorption, and phosphate clearance.

Purpose of the Study:

  • To outline the causes, diagnosis, and management of hypoparathyroidism.
  • To highlight the role of PTH in calcium homeostasis and the consequences of its deficiency.
  • To discuss current and emerging therapeutic strategies for hypoparathyroidism.

Main Methods:

  • Review of literature on hypoparathyroidism.
  • Analysis of diagnostic criteria including biochemical investigations.
  • Evaluation of treatment modalities for hypocalcemia and long-term management.

Main Results:

  • The most frequent cause of hypoparathyroidism is iatrogenic, often following anterior neck surgery.
  • Congenital or acquired disorders, including autoimmune diseases and genetic abnormalities, can also lead to hypoparathyroidism.
  • Treatment focuses on correcting hypocalcemia with calcium and vitamin D, with thiazide diuretics and PTH replacement offering additional benefits.

Conclusions:

  • Effective management of hypoparathyroidism requires careful monitoring of calcium, vitamin D, and phosphate levels.
  • PTH replacement therapy shows promise in normalizing calcium and phosphate levels and reducing medication requirements.
  • Understanding the diverse causes and effective treatment strategies is essential for improving patient outcomes in hypoparathyroidism.