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Graves' Disease I: Introduction

Graves' Disease I: Introduction

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...

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 II: Pathophysiology

Graves Disease II: Pathophysiology

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,...

Hypothyroidism II: Pathophysiology

Hypothyroidism II: Pathophysiology

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...

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...

Synthesis and Regulation of Thyroid Hormones

Synthesis and Regulation of Thyroid Hormones

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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Updated: May 2, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

[Haemostatic abnormalities and thyroid disorders: the prospective observational MITH study].

Massimo Garofano, Massimo Franchini, Silvia Crestani

Recenti Progressi in Medicina

|March 15, 2014

Summary

This summary is machine-generated.

Thyroid disease affects blood clotting, with hyperthyroidism increasing clot risk and severe hypothyroidism causing bleeding. Subclinical hypothyroidism also elevates thrombotic risk, highlighting the need for careful haemostasis evaluation.

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Area of Science:

Endocrinology
Hematology
Thrombosis and Hemostasis

Context:

Thyroid dysfunction is frequently linked to haemostatic abnormalities.
Hyperthyroidism presents a higher risk for thrombotic events.
Severe hypothyroidism is associated with a haemorrhagic tendency, while subclinical hypothyroidism correlates with increased thrombotic risk.

Purpose:

To evaluate coagulation parameters in patients with thyroid disease.
To determine the prevalence of haemostatic abnormalities across different thyroid conditions.
To analyze the clinical implications and therapeutic responses related to these abnormalities.

Summary:

The Mantua Investigation on Thyroid and Haemostasis (MITH) study prospectively observed patients with thyroid disease.
Coagulation parameters were assessed to understand haemostatic profiles in hyperthyroidism, hypothyroidism, and subclinical hypothyroidism.
Findings aim to clarify the relationship between thyroid status and bleeding or clotting risks.

Impact:

Provides insights into the complex interplay between thyroid hormones and the haemostatic system.
Informs clinical practice regarding the assessment and management of thrombotic and bleeding risks in thyroid patients.
Establishes a foundation for further research into targeted therapies for haemostatic complications in thyroid disease.