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Related Concept Videos

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 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...
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 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...
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...
Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...

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Related Experiment Video

Updated: May 25, 2026

Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
07:12

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

Published on: August 17, 2022

Post-operative partial hypoparathyroidism: an under-recognized disorder.

Ruth S Prichard1, Pamela J Edhouse, Stanley B Sidhu

  • 1University of Sydney Endocrine Surgical Unit, Sydney, Australia.

ANZ Journal of Surgery
|February 3, 2012
PubMed
Summary
This summary is machine-generated.

Total thyroidectomy can lead to partial hypoparathyroidism, where patients need calcium despite normal parathyroid hormone (PTH) levels. This newly identified condition requires further understanding for improved patient care.

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Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
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Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

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Last Updated: May 25, 2026

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

Area of Science:

  • Endocrinology
  • Surgical Complications
  • Metabolic Disorders

Background:

  • Permanent hypoparathyroidism is a known complication of total thyroidectomy.
  • Some patients require ongoing calcium supplementation post-surgery despite normal parathyroid hormone (PTH) levels.
  • This suggests a potential disorder of partial hypoparathyroidism.

Purpose of the Study:

  • To characterize the disorder of post-operative partial hypoparathyroidism.
  • To identify potential risk factors associated with this condition.

Main Methods:

  • Retrospective study of patients who underwent total thyroidectomy (excluding permanent hypoparathyroidism).
  • Patients completed interviews and had serum calcium and PTH measured.
  • Data collected included demographics, surgical details, parathyroid gland autotransplantation, symptoms, and calcium requirements.

Main Results:

  • 0.77% overall rate of permanent hypoparathyroidism.
  • 10 (5%) additional patients had normal PTH but required calcium supplementation.
  • These patients were predominantly female, with a mean age of 48.5 years and partial parathyroid gland autotransplantation.

Conclusions:

  • Partial re-vascularization of parathyroid cells can occur after total thyroidectomy.
  • This leads to inadequate parathyroid reserve, causing symptoms of hypocalcaemia despite measurable PTH levels.
  • This previously undescribed condition of partial hypoparathyroidism is an important complication of total thyroidectomy.