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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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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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Hyperthyroidism II: Pathophysiology01:27

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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 is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence...
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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,...
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Goiter01:27

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Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...
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An Orthotopic Mouse Model of Anaplastic Thyroid Carcinoma
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[Toxic nodular goiter].

A Sarr1, Mbaye M Ndour, S N Diop

  • 1Clinique Médicale II, Centre Hospitalier Abass NDAO, BP 7920 Dakar Sénégal. annasarr@sentoo.sn

Dakar Medical
|December 24, 2008
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Summary
This summary is machine-generated.

Toxic nodular goiter predominantly affects young females and is often severe, presenting with cardiothyreosis. This study highlights challenges in managing toxic nodular goiter and its treatment outcomes.

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Area of Science:

  • Endocrinology
  • Internal Medicine
  • Thyroidology

Background:

  • Toxic nodular goiter studies are scarce in this region.
  • Previous research primarily discussed hyperthyroidism generally.

Purpose of the Study:

  • To analyze the epidemiological, clinical, and therapeutic aspects of toxic nodular goiter.
  • To address the lack of specific studies on toxic nodular goiter in the country.

Main Methods:

  • Retrospective analysis of 62 toxic nodular goiter cases (1979-1999).
  • Diagnostic criteria included thyroid nodules with thyrotoxicosis signs, hyperfixating nodule on iodine-131 scintigraphy, and elevated thyroid hormones (T3/T4).

Main Results:

  • Toxic nodular goiter predominantly affected young females (solitary: 40 yrs, 47 F/2 M; multi-nodular: 45 yrs, all F).
  • Cardiothyreosis was prevalent (34.3% solitary, 46.5% multi-nodular).
  • High patient dropout rates (62% medical, 94.6% surgical follow-up).

Conclusions:

  • Toxic nodular goiter is more common in young women and associated with significant cardiothyreosis.
  • Therapeutic management and follow-up present considerable challenges.