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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
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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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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...
28
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

23
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

Graves Disease II: Pathophysiology

26
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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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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An Orthotopic Mouse Model of Anaplastic Thyroid Carcinoma
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Hyperthyroidism crisis and complex pancytopenia: A case report.

Xiaotian Lei1, Weiling Leng2, Min Long2

  • 1Department of Endocrinology, First Affiliated Hospital of Army Medical University, Chongqing 400038. leixiaotian@tmmu.edu.cn.

Zhong Nan Da Xue Xue Bao. Yi Xue Ban = Journal of Central South University. Medical Sciences
|January 9, 2025
PubMed
Summary
This summary is machine-generated.

Antithyroid drugs like methimazole can cause severe blood disorders, including pancytopenia, especially when combined with hyperthyroidism crisis. Prompt treatment involving infection control and blood cell stimulation is crucial for patient survival.

Keywords:
hyperthyroidismimmune-related thrombocytopeniapancytopeniathyroid crisis

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Area of Science:

  • Internal Medicine
  • Hematology
  • Endocrinology

Background:

  • Antithyroid drugs (ATDs) are used to treat hyperthyroidism.
  • ATDs can rarely cause severe hematological side effects like neutropenia, agranulocytosis, and pancytopenia.
  • Concurrent hyperthyroidism crisis significantly increases mortality risk in patients with ATD-induced blood disorders.

Observation:

  • A case of pancytopenia induced by methimazole in a patient with systemic lupus erythematosus and secondary hyperthyroidism crisis was reported.
  • The patient presented with agranulocytosis, a severe form of neutropenia.
  • The complex clinical scenario involved multiple critical conditions requiring careful management.

Findings:

  • The patient received timely and appropriate treatment, including anti-infection measures, granulocyte colony-stimulating factors to stimulate white blood cell production, and compound iodine solution to manage thyroid function.
  • This multi-faceted approach effectively controlled the patient's critical conditions.
  • The patient's life was successfully saved through prompt and tailored medical intervention.

Implications:

  • Early identification and management of pancytopenia in hyperthyroid patients are critical.
  • Dynamic adjustment of treatment plans based on the patient's evolving condition is essential.
  • This case highlights the importance of a comprehensive approach in managing life-threatening complications of hyperthyroidism therapy.