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Related Concept Videos

Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

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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...
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Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

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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,...
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The Parathyroid Glands00:59

The Parathyroid Glands

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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...
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Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

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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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Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

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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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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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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...
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Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
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Mortality associated with primary hyperparathyroidism.

P B Clifton-Bligh1, M L Nery2, R Supramaniam3

  • 1Department of Endocrinology, Royal North Shore Hospital, St Leonards, Australia; University of Sydney, Australia.

Bone
|February 1, 2015
PubMed
Summary
This summary is machine-generated.

Primary hyperparathyroidism significantly increases mortality risk. However, serum calcium levels did not correlate with mortality, and surgery did not impact survival rates in this long-term study.

Keywords:
HyperparathyroidismMortality

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Area of Science:

  • Endocrinology
  • Oncology
  • Epidemiology

Background:

  • Primary hyperparathyroidism is a common endocrine disorder.
  • Long-term outcomes and mortality associated with primary hyperparathyroidism require further investigation.

Purpose of the Study:

  • To evaluate the long-term survival rates of patients with primary hyperparathyroidism.
  • To determine the impact of serum calcium levels and parathyroid surgery on mortality.
  • To analyze trends in mortality based on diagnosis periods.

Main Methods:

  • Retrospective cohort study of 561 patients with primary hyperparathyroidism followed from 1961 to 1994.
  • Comparison of relative survival rates with the general Australian population.
  • Analysis of subgroups based on serum calcium levels, parathyroid surgery, and diagnosis periods (1972-1981 vs. 1982-1991).

Main Results:

  • Overall mortality was significantly higher in the hyperparathyroid cohort (P<0.001).
  • Serum calcium levels (>3.00 mmol/L vs. <3.00 mmol/L) did not significantly affect mortality.
  • Patients not undergoing surgery had lower mean serum calcium and parathyroid hormone (PTH) levels but similar survival to surgical patients.
  • Patients diagnosed between 1982-1991 showed significantly worse relative mortality than those diagnosed between 1972-1981 (P<0.001), despite similar calcium/PTH levels, but were older at diagnosis.

Conclusions:

  • Primary hyperparathyroidism is associated with increased mortality.
  • Serum calcium levels and surgical intervention may not be the primary drivers of mortality in the long term.
  • Worsening mortality trends observed in later diagnosis periods warrant further investigation into contributing factors beyond age and biochemical markers.