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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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Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

30
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...
30
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,...
26
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...
23
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

26
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...
26
The Thyroid Gland01:23

The Thyroid Gland

6.9K
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.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
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Imaging of the Microstructural Failure Mechanism in the Human Hip
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Pathological fracture in hyperthyroidism.

S Chmell

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    Summary
    This summary is machine-generated.

    Thyrotoxicosis can cause severe osteopenia, leading to fractures. Treating the thyroid condition with antithyroid therapy effectively reverses bone loss and corrects the hormonal imbalance.

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    Area of Science:

    • Endocrinology
    • Bone Metabolism
    • Pathology

    Background:

    • This case study examines a young woman experiencing severe osteopenia due to thyrotoxicosis.
    • The patient presented with a pathological humeral fracture, highlighting a critical complication of the condition.

    Discussion:

    • Thyroid hormones appear to directly stimulate osteoclastic resorption, accelerating bone breakdown.
    • This direct stimulation contributes significantly to the development of thyrotoxic osteopenia.

    Key Insights:

    • Severe osteopenia and pathological fractures can be a direct consequence of thyrotoxicosis.
    • Thyroid hormone excess directly impacts bone remodeling by increasing osteoclastic activity.

    Outlook:

    • Antithyroid therapy is crucial for managing thyrotoxicosis-induced bone loss.
    • Effective management can correct the hormonal derangement and improve bone health outcomes.