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Related Concept Videos

Hyperthyroidism I: Introduction01:25

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: Pathophysiology01:24

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...
Hyperthyroidism II: Pathophysiology01:27

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: Introduction01:28

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...
Metastasis02:30

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...

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Related Experiment Video

Updated: Jun 7, 2026

Spontaneous Murine Model of Anaplastic Thyroid Cancer
05:39

Spontaneous Murine Model of Anaplastic Thyroid Cancer

Published on: February 3, 2023

Medullary thyroid carcinoma presenting with an initial CEA elevation.

Deepak Abraham1, Leigh Delbridge, Roderick Clifton-Bligh

  • 1University of Sydney Endocrine Surgical Unit, Royal North Shore Hospital, St. Leonard's 2065 NSW, Australia.

ANZ Journal of Surgery
|October 26, 2010
PubMed
Summary
This summary is machine-generated.

Elevated carcinoembryonic antigen (CEA) can indicate medullary thyroid cancer, not just gastrointestinal issues. This study highlights neuroendocrine tumors as a potential cause for raised CEA when GI malignancy is ruled out.

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Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer
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Last Updated: Jun 7, 2026

Spontaneous Murine Model of Anaplastic Thyroid Cancer
05:39

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Published on: February 3, 2023

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer
03:55

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

Published on: June 9, 2023

Area of Science:

  • Oncology
  • Endocrinology
  • Gastroenterology

Background:

  • Carcinoembryonic antigen (CEA) is a widely recognized tumor marker.
  • Elevated CEA levels often prompt investigations for gastrointestinal malignancy.
  • The gastrointestinal tract is not the sole source of CEA production.

Purpose of the Study:

  • To investigate non-gastrointestinal sources of elevated CEA.
  • To highlight medullary thyroid cancer as a differential diagnosis for raised CEA.
  • To inform clinical practice regarding the interpretation of elevated CEA levels.

Main Methods:

  • Presentation of a case series of patients with elevated CEA.
  • Initial investigation focused on excluding gastrointestinal malignancy.
  • Subsequent diagnosis of medullary thyroid cancer in evaluated patients.

Main Results:

  • Four patients with elevated CEA were initially assessed for gastrointestinal causes.
  • Medullary thyroid cancer was identified as the source of elevated CEA in these patients.
  • Discussion of non-gastrointestinal etiologies for elevated CEA.

Conclusions:

  • Elevated CEA warrants consideration of neuroendocrine tumors, particularly medullary thyroid cancer.
  • When gastrointestinal malignancy is excluded, medullary thyroid cancer should be considered.
  • This finding emphasizes the importance of a broad differential diagnosis for elevated CEA.