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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...

Hyperthyroidism II: Pathophysiology

Hyperthyroidism II: Pathophysiology

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...

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...

The Thyroid Gland

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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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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...

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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Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer

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[Thyroid carcinoma. A descriptive retrospective study].

Carolina C Gonzalez¹, Maria Lucy Yaniskowski, Eduardo P Wyse

¹Servicio de Endocrinologia, Hospital Privado de Córdoba, Naciones Unidas 346, 5016 Córdoba, Argentina. carogz@argentina.com

|January 24, 2007

Summary

Thyroid carcinoma (TC) is most common in women under 45 with normal thyroid function. Elevated serum thyroglobulin levels indicate residual TC, but don't guarantee disease-free status.

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Spontaneous Murine Model of Anaplastic Thyroid Cancer

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Area of Science:

Endocrinology
Oncology
Nuclear Medicine

Context:

Thyroid carcinoma (TC) is a relatively rare but often slow-growing and curable cancer.
Characterizing TC patient demographics and disease progression is crucial for effective management.
This study analyzed 171 TC patients treated between 2000-2004.

Purpose:

To analyze the clinical characteristics of thyroid carcinoma patients.
To evaluate the diagnostic utility of fine needle aspiration (FNA) and stimulated serum thyroglobulin (Tg) levels in TC management.
To assess the correlation between tumor stage, patient demographics, and disease recurrence.

Summary:

The study retrospectively analyzed 171 TC patients, predominantly female (88%) and under 45 years old (62%), with normal thyroid function (77%).
Papillary thyroid carcinoma (PTC) was the most common type (96%), with most patients diagnosed at Stage I (SI).
Fine needle aspiration (FNA) achieved a 78% diagnostic rate. Stimulated serum thyroglobulin levels >2 ng/ml strongly indicated residual TC, with 90-100% positivity for Tg >2 ng/ml, though Tg <2 ng/ml still showed positive imaging in 18% of cases.

Impact:

Thyroid carcinoma is more prevalent in younger women and those with euthyroid function.
Stimulated serum thyroglobulin is a valuable marker for detecting residual thyroid carcinoma.
Further research is needed to identify markers that can definitively confirm disease-free status in TC patients.