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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...
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...
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...
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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...

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Related Experiment Video

Updated: Jul 9, 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

[Transient neonatal pseudohypoparathyroidism].

Maja Jesić, Milos Jesić, Silvija Sajić

    Srpski Arhiv Za Celokupno Lekarstvo
    |December 20, 2007
    PubMed
    Summary

    Transient neonatal pseudohypoparathyroidism (PHP) can resolve spontaneously. This case highlights a rare transient form, confirmed by successful therapy withdrawal in an infant with hypocalcaemia and hyperphosphataemia.

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    Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation

    Published on: March 14, 2017

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    Last Updated: Jul 9, 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

    Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
    07:13

    Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation

    Published on: March 14, 2017

    Area of Science:

    • Pediatric Endocrinology
    • Genetics and Molecular Biology
    • Metabolic Disorders

    Background:

    • Pseudohypoparathyroidism (PHP) is a genetic disorder causing parathormone (PTH) resistance.
    • Characterized by hypocalcaemia, hyperphosphataemia, and elevated PTH levels.
    • Includes receptor or post-receptor defects leading to end-organ unresponsiveness.

    Observation:

    • A 17-day-old male infant presented with seizures.
    • Biochemical analysis revealed hypocalcaemia, hyperphosphataemia, and high PTH.
    • Diagnosis of PHP was established based on biochemical markers.

    Findings:

    • The infant showed sustained normocalcaemia after alphacalcidiol and oral calcium therapy.
    • Therapy was successfully withdrawn after 4 months.
    • The infant remained seizure-free with normal calcium and phosphorus levels for six months post-therapy.

    Implications:

    • This case confirms a rare transient neonatal form of pseudohypoparathyroidism.
    • Early diagnosis and management are crucial for distinguishing transient from permanent PHP.
    • Successful withdrawal of therapy indicates a favorable prognosis for transient forms.