Thyroid Disorders Associated With Iodine Deficiency and Excess (Serono Symposia Publications from Raven Press, 22)

Cover of: Thyroid Disorders Associated With Iodine Deficiency and Excess (Serono Symposia Publications from Raven Press, 22) |

Published by Lippincott Williams & Wilkins .

Written in English

Read online


  • Medicine,
  • Medical Endocrinology,
  • Medical / Nursing,
  • Nutritional aspects,
  • Endocrinology & Metabolism,
  • Diseases,
  • Congresses,
  • Goiter,
  • Thyroid gland

Edition Notes

Book details

ContributionsR. Hall (Editor), J. Kobberling (Editor)
The Physical Object
Number of Pages470
ID Numbers
Open LibraryOL8174571M
ISBN 100881670979
ISBN 109780881670974

Download Thyroid Disorders Associated With Iodine Deficiency and Excess (Serono Symposia Publications from Raven Press, 22)

THYROID DISORDERS ASSOCIATED WITH IODINE DEFICIENCY AND EXCESS (Serono Symposia Publications from Raven Press; v. 22) International Standard Book Number Library of Congress Catalog Number The material contained in.

Thyroid disorders associated with iodine deficiency and excess. New York: Raven Press, © (OCoLC) Online version: Thyroid disorders associated with iodine deficiency and excess.

New York: Raven Press, © (OCoLC) Material Type: Conference publication: Document Type: Book: All Authors / Contributors: Reginald Hall; J. Hence, the iodine intake should be brought to a level at which iodine deficiency disorders are avoided but not higher.

Iodine supplementation programs should aim at relatively uniform iodine intake, avoiding deficient or excessive iodine intake in subpopulations. To adopt such a. Iodine deficiency early in life impairs cognition and growth, but iodine status is also a key determinant of thyroid disorders in adults.

Severe iodine deficiency causes goitre and hypothyroidism because, despite an increase in thyroid activity to maximise iodine uptake and recycling in this setting, iodine concentrations are still too low to enable production of thyroid by: Iodine Deficiency PREGNANCY-RELATED PROBLEMS – Iodine deficiency is especially important in women who are pregnant or nursing their infants.

Severe iodine deficiency in the mother has been associated with miscarriages, stillbirth, preterm File Size: KB. microg iodine are daily required for thyroid hormone synthesis.

The thyroid gland has intrinsic mechanisms that maintain normal thyroid function even in the presence of iodine excess. Large quantities of iodide are present in drugs, antiseptics, contrast media and food preservatives. Iodine indu. Thyroid disorders associated with iodine excess.

When normal thyroidal adaptation to excess iodine exposure fails, resulting morbidities are varied and often disparate. Responses depend on prior iodine status, and the risk of morbidity increases in populations previously affected by endemic iodine deficiency.

Increased thyroidal volume and goiter. Little is known about iodine adequacy and gestational thyroid disorders (GTDs) in Saudi Arabia. This study measured the rates of GTDs and iodine adequacy in healthy Saudi women.

Concentrations of serum thyroid hormones and h urine iodine (h UIC), and GTDs were diagnosed according to the American Thyroid Association guidelines.

Dietary and socioeconomic data to. Iodine is present naturally in soil and seawater. The availability of iodine in foods differs in various regions of the world. Individuals in the United States can maintain adequate iodine in their diet by using iodized table salt, by eating foods high in iodine, particularly dairy products, seafood, meat, some breads, and eggs, and by taking a multivitamin containing iodine (see below).

Iodine is critical to human health. It forms the basis of thyroid hormones and plays many other roles in human biochemistry. While the thyroid gland contains the body’s highest concentration of iodine, the salivary glands, brain, cerebrospinal fluid, gastric mucosea, breasts, ovaries and a part of the eye also concentrate iodine.

The Risks of Excessive Iodine. Hypothyroidism is an ailment in which the production of thyroid hormones is inadequate. This problem can be caused by a number of reasons, such as the excessive use of iodine in the diet. Excessive consumption of iodine can block the activity of thyroid glands.

This is a very rare problem in developed countries. There is evidence to suggest that elevated levels of iodide in the diet are associated with autoimmune thyroid disease (ATD) in susceptible individuals, and that autoimmune thyroiditis (Hashimoto's disease) is less common in susceptible individuals who live in regions with dietary iodine deficiency.

Iodine is essential for thyroid hormone synthesis. High iodine intakes are well tolerated by most healthy individuals, but in some people, excess iodine intakes may precipitate hyperthyroidism, hypothyroidism, goiter, and/or thyroid autoimmunity.

Individuals with preexisting thyroid disease or those. Thyroid Disorders & Treatments Iodine Deficiency & Excess. Iodine Deficiency And Excess. Iodine is the cause of more thyroid problems than all other food substances combined.

You can get sick from eating either too much or too little iodine. Iodine deficiency is uncommon in the Western world because iodine is added to salt.

Where iodine deficiency is not a problem, the most common cause of hypothyroidism is Hashimoto’s thyroiditis. This is another autoimmune disease, but in this case, the immune system destroys the thyroid. Iodine deficiency: Iodine is used by the thyroid to produce hormones. An iodine deficiency is an issue that affects several million people around the world.

A non-functioning thyroid gland: Sometimes, the thyroid gland doesn’t work correctly from birth. This affects about 1 in 4, newborns. together are called "iodine deficiency disorders," or IDD. These consequences are as follows: 1. Goiter (see Figurespage 21) The term "goiter" means a thyroid gland that is bigger than normal.

People with iodine deficiency have goiters because they do not make enough thyroid hormone. Iodine excess was only associated with higher odds of overt hyperthyroidism and subclinical hypothyroidism, while iodine deficiency was significantly associated with higher odds of most thyroid disorders.

In addition, increased iodine intake was significantly associated with elevated serum thyrotropin levels but was inversely associated with. By far, the most serious defect that may be associated with abnormal iodine intake is developmental brain damage caused by severe iodine deficiency.

11 In foetal life, brain development takes place over a long period, starting as early as a few weeks after conception and continuing during the first years after birth.

12 The iodine necessary for thyroid hormone production by the mother, the. The most common cause of thyroid disorders world-wide is iodine deficiency except in the areas with adequate iodine nutrition where thyroid autoimmunity is the major cause [11]. Severe iodine deficiency causes hypothyroidism, while at the same time excessive iodine intake can also negatively impact thyroid function [12].

Iodine is a nutrient that shares quite a complex relationship with Thyroid function, Thyroid disorders and Hashimoto’s disease. While iodine intake is needed for optimal Thyroid function, it does seem like excessive intake of this nutrient can be detrimental to a patient suffering from Hashimoto’s disease and an underactive Thyroid.

INTRODUCTION. Thyroid disorders are common worldwide. 1 In Africa, dietary iodine deficiency is the major determinant of thyroid pathology, resulting in a spectrum of iodine deficiency disorders, including goitres, hypothyroidism and mental retardation. 2 Of these, mental retardation poses the most severe threat to socioeconomic wellbeing; thus, its prevention has been the focus of current.

and sustainable way to eliminate iodine deficiency disorders for more than 25 years. Currently, the relationship between USI and iodine excess has attracted more attention. Iodine excess can lead to hypothyroidism and autoimmune thyroiditis, especially for susceptible populations with recurring thyroid disease, the elderly, fetuses, and neonates.

Background: Insufficient or excessive iodine intake during gestation may compromise adaptive mechanisms in maternal thyroid function and lead to adverse pregnancy outcomes.

In this context, we aimed to study the effects of maternal iodine status in the first and third trimesters of gestation on obstetric and neonatal outcomes in an iodine-sufficient population in Rio de Janeiro, Brazil.

study was to identify the effect on thyroid under chronic iodine excess. The specific aims of the paper was (1) to confirm whether excess iodine is associated with thyroid diseases such as. Signs and symptoms of iodine deficiency include: Swelling of the thyroid glands in the neck.

This can cause a visible lump, called a goiter, to form on your neck. Wang et al. reported that total goiter rate was correlated with average thyroid volume after the elimination of iodine deficiency diseases, and that an an increase in UIC from less than μg/L to over μg/L decreased the average thyroid volume whereas a steady state of over μg/L was associated with a slight increase in the average.

Although mild iodine deficiency results in enlarged thyroid glands, evidence of clinical hypothyroidism does not necessarily follow. Conversely, even mildly to moderately excessive iodine intake (≥ μ g/day) through foods, dietary supplements, topical medications, and/or iodinated contrast media [5] can increase risk for hypothyroidism.

[6]. Szabolcs I, Podoba J, Feldkamp J, et al. Comparative screening for thyroid disorders in old age in areas of iodine deficiency, long-term iodine prophylaxis and abundant iodine intake.

Clin. Iodine deficiency early in life impairs cognition and growth, but iodine status is also a key determinant of thyroid disorders in adults. Severe iodine deficiency causes goitre and hypothyroidism because, despite an increase in thyroid activity to maximise iodine uptake and recycling in this setting, iodine concentrations are still too low to enable production of thyroid hormone.

Introduction. Iodine is required for the synthesis of thyroid hormones; both insufficient and excess intake may lead to thyroid disease. Data from the World Health Organization (WHO), United Nations Children’s Fund (UNICEF), and International Council for the Control of Iodine Deficiency Disorders (ICCIDD) in estimated that about 30% ( million) of the world’s population has.

Hypothyroidism in infants with congenital heart disease exposed to excess iodine. J Endocr Soc – 4. Leung A, Braverman LE () Consequences of iodine excess. Nat Rev Endocrinol – 5. Lee SY, Rhee CM, Leung AM, Braverman LE, Brent GA, Pearce EN () A review: radiographic iodinated contrast media-induced thyroid.

Iodine induced hyperthyroidism is frequently observed in patients affected by euthyroid iodine deficient goiter when suddenly exposed to excess iodine.

Possibly the presence of autonomous thyroid function permits the synthesis and release of excess quantities of thyroid hormones. thyroiditis or autoimmune thyroid disease). It can also be caused by severe iodine deficiency. Congenital Hyperthyroidism Excessive thyroid hormone levels at birth, either transient (due to maternal Grave’s disease) or persistent (due to genetic mutation).

Congenital Hypothyroidism Infants born with an under active thyroid gland and presumed. A number of reports have associated high levels or overconsumption of iodized salt in food with iodine excess and thyroid disorders in Mexico [31], Somalia [32], China [26,33], Bulgaria [34], Brazil [35], Sri Lanka [36] and African countries [37,38,39,40].

Iodine is needed by the main thyroid hormone, Thyroid-stimulating hormone (TSH), to release T3 and T4 and prevent the development of a goiter (an enlarged thyroid). You can see many women in central Africa having massive goiters – due to iodine deficiency.

Ovaries. After the thyroid, the ovaries have the highest concentration of iodine. That. effect of iodine intake on thyroid diseases in china n engl j med ;26 j Assays Both the baseline and follow-up studies used the.

Iodine deficiency is one of the most prevalent causes of mental development disorders in children causing poor school performance and reduced work capacity. In addition, it can lead to impaired thyroid function, goiter, and other iodine deficiency disorders (IDDs). In Europe, mild-to-moderate iodine deficiency is very common.

Following widespread efforts to eradicate iodine deficiency disorders (IDD) worldwide — first launched in the s and continuing today — epidemiologists noted an unexpected phenomenon: a significant uptick in the rates of both autoimmune thyroiditis (Hashimoto’s disease) and thyroid cancer.

Initial wisdom suggested that because eradication efforts favored universal salt. For example, people in moderate to mild iodine deficiency in Denmark had higher prevalence of hyperthyroidism, compared with Iceland's population with excessive iodine intake.

40 Hypothyroidism as a result of low iodine intake could also increase the risk for the development of nodular goitre and thyroid nodules. 41 Iodine deficiency could lead. World Iodine Deficiency Day is observed on October 21 every year, to emphasize the importance of iodine, as a beneficial essential nutrient and for preserving total healthcare.

It is an international health campaign, also termed as Global Iodine Deficiency Disorders Prevention Day, marked by several developed and developing nations, to effectively tackle complications arising from inadequate.The thyroid is charged with producing, storing and releasing hormones into the blood stream.

If this function is not carried out as planned it may result in a number of disorders. Review what you learnt on Block 13 on thyroid disorders and drugs by taking this quiz. All the best!Chen X et al. Effect of excessive iodine on immune function of lymphocytes and intervention with selenium.

J Huazhong Univ Sci Technolog Med Sci. ;27(4)– Zagrodzki P, Ratajczak R. Selenium supplementation in autoimmune thyroiditis female patient– effects on thyroid and ovarian functions (case study).

83312 views Friday, November 13, 2020