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Related Concept Videos

The Thyroid Gland01:23

The Thyroid Gland

7.0K
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...
7.0K
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
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

28
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...
28
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
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
Goiter01:27

Goiter

32
Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...
32

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An Orthotopic Mouse Model of Anaplastic Thyroid Carcinoma
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Thyroid cancer: a lethal endocrine neoplasm.

J Robbins, M J Merino, J D Boice

    Annals of Internal Medicine
    |July 15, 1991
    PubMed
    Summary
    This summary is machine-generated.

    Managing thyroid cancer can be improved, particularly for potentially fatal cases. Early detection and tailored treatments, including radioiodine therapy, are key to better outcomes for thyroid cancer patients.

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    Area of Science:

    • Endocrinology
    • Oncology
    • Cancer Management

    Background:

    • Thyroid cancer, while having a low mortality rate, presents the highest mortality among endocrine gland cancers.
    • Childhood radiation exposure in the mid-20th century increased thyroid cancer incidence, primarily papillary types, in young adults; long-term effects on mortality are emerging.
    • Risk factors for increased thyroid cancer mortality include advanced patient age, aggressive tumor characteristics, distant metastases, and specific cell types like anaplastic or medullary cancer.

    Purpose of the Study:

    • To explore controversies and potential improvements in managing thyroid cancer.
    • To discuss risk factors influencing thyroid cancer mortality and prognostic indicators.
    • To review current and novel therapeutic strategies, including radioiodine therapy and its optimization.

    Main Methods:

    • Review of current management strategies for thyroid cancer.
    • Analysis of risk factors and prognostic indicators for thyroid cancer mortality.
    • Discussion of diagnostic tumor markers and their clinical utility.
    • Exploration of surgical protocols, follow-up strategies, and radioiodine therapy.

    Main Results:

    • While local lymph node metastases don't significantly increase papillary cancer mortality, they impact follicular and medullary cancer survival.
    • Early detection of familial medullary cancer is facilitated by serum calcitonin measurements.
    • Serum thyroglobulin levels, post-thyroidectomy, aid in detecting recurrent or metastatic papillary and follicular thyroid cancer.
    • Current chemotherapy regimens show limited efficacy, highlighting the need for improved radioiodine therapy and novel treatment approaches.

    Conclusions:

    • Optimizing thyroid cancer treatment requires addressing risk factors and utilizing effective tumor markers for early detection and recurrence monitoring.
    • Enhancing radioiodine therapy efficacy and exploring new treatment modalities are crucial due to chemotherapy resistance.
    • Improved management strategies, from surgery to follow-up and targeted therapies, hold promise for improving outcomes in potentially fatal thyroid cancer cases.