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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 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, and heat...

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 in...

Metastasis

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...

Cholecystitis

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Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...

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Spontaneous Murine Model of Anaplastic Thyroid Cancer

Spontaneous Murine Model of Anaplastic Thyroid Cancer

Published on: February 3, 2023

Thyroid metastases from gallbladder cancer.

Jean M Butte¹, Luis Marín, Manuel Meneses

¹Instituto Oncológico Fundación Arturo López Pérez, Rancagua, 878, Santiago, Chile.

Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract

|November 22, 2008

Summary

This summary is machine-generated.

Thyroid metastasis from gallbladder cancer is rare. This case report details a patient who developed thyroid metastases after radical resection and chemoradiation for gallbladder cancer, highlighting an unusual presentation of advanced disease.

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Area of Science:

Oncology
Surgical Oncology
Gastrointestinal Oncology

Background:

Gallbladder cancer is an aggressive malignancy with radical resection as the primary curative treatment.
Thyroid metastases are uncommon, with renal tumors being the most frequent primary source.
Gastrointestinal tract tumors can metastasize to the thyroid, though infrequently.

Observation:

A patient with T2N1M0 gallbladder cancer underwent radical resection and postoperative chemoradiation.
The patient subsequently developed metastases in the thyroid gland.

Findings:

This case presents a rare instance of gallbladder cancer metastasizing to the thyroid.
The occurrence highlights the potential for unusual metastatic patterns in advanced gallbladder malignancy.

Implications:

Awareness of rare metastatic sites like the thyroid is crucial for comprehensive cancer staging and management.
This case may inform surveillance strategies for patients treated for gallbladder cancer.
Further research into the mechanisms of rare gallbladder cancer metastasis is warranted.