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Related Concept Videos

Biological Effects of Radiation02:59

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
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...
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...
Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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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...

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Related Experiment Videos

[Radiation exposure and thyroid cancer].

Matteo Angelo Cannizzaro1, Massimiliano Veroux, Mario Costanzo

  • 1Dipartimento di Scienze Chirurgiche, Universita degli Studi di Catania, Catania, Italy. cannizzaromatteoangelo@yahoo.it

Annali Italiani Di Chirurgia
|October 16, 2012
PubMed
Summary

Radiation exposure significantly increases thyroid cancer risk, particularly in children. Iodine deficiency exacerbates this risk, while stable iodine supplementation can mitigate it.

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Area of Science:

  • Endocrinology
  • Oncology
  • Radiation Biology

Context:

  • Thyroid cancer is the most common endocrine malignancy, with increasing incidence globally over the past three decades.
  • Radiation exposure is a well-established risk factor for thyroid cancer, including medical radiation and fallout from nuclear events.
  • The risk is highest in early childhood due to thyroid tissue's developmental characteristics.

Purpose:

  • To review the established link between radiation exposure and thyroid cancer.
  • To highlight age-dependent risks and the role of iodine in modulating susceptibility.
  • To discuss the molecular mechanisms, including specific mutations, associated with radiation-induced thyroid cancer.

Summary:

  • Thyroid cancer incidence is rising worldwide, with radiation exposure being a primary risk factor.
  • Children exposed to radiation face a higher risk of developing thyroid cancer, a risk influenced by iodine levels.
  • Ionizing radiation induces mutations, such as RET/PTC, which are more prevalent in radiation-associated pediatric papillary thyroid carcinomas.

Impact:

  • Understanding radiation's role is crucial for public health strategies and cancer prevention, especially in populations with potential exposure.
  • This knowledge informs risk assessment and management protocols for individuals exposed to radiation.
  • Further research into radiation dosimetry and genetic susceptibility can refine prevention and treatment approaches for thyroid cancer.