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Hyperthyroidism I: Introduction

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...

Graves' Disease I: Introduction

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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 in...

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, and heat...

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 receptors...

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...

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.
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Mixed Reality Assisted Radical Endoscopic Thyroidectomy

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Approach to the patient with postpartum thyroiditis.

Alex Stagnaro-Green¹

¹George Washington University School of Medicine and Health Sciences, Washington, D.C. 20037, USA. msdasg@gwumc.edu

The Journal of Clinical Endocrinology and Metabolism

|February 8, 2012

Summary

Postpartum thyroiditis (PPT) affects 5.4% of women, often presenting with hypothyroidism. Early detection and symptom management are key for maternal health and future pregnancy planning.

Area of Science:

Endocrinology
Immunology
Obstetrics

Background:

Postpartum thyroiditis (PPT) is a de novo autoimmune thyroid disease occurring within the first year after childbirth.
Its incidence is 5.4% in the general population, with higher rates in women with other autoimmune conditions like type 1 diabetes.

Observation:

The classic hyperthyroid-hypothyroid pattern occurs in 22% of cases.
Most women experience isolated hypothyroidism (48%) or thyrotoxicosis (30%).
Thyroid antibody positivity in early pregnancy increases PPT risk up to 50%.

Findings:

Hypothyroid symptoms include fatigue, dry skin, and memory impairment.
Conflicting data exists on the link between PPT and postpartum depression.
20-40% of women with PPT develop permanent hypothyroidism.

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Implications:

Selenium supplementation shows potential but requires further research.
Treatment of hyperthyroid PPT focuses on symptom control.
Hypothyroid PPT treatment is indicated for symptom relief and in breastfeeding or conception-seeking women.