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subclinical hyperthyroidism

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https://www.readbyqxmd.com/read/28102101/thyroid-in-pregnancy-from-physiology-to-screening
#1
Drahomira Springer, Jan Jiskra, Zdenka Limanova, Tomas Zima, Eliska Potlukova
Thyroid hormones are crucial for the growth and maturation of many target tissues, especially the brain and skeleton. During critical periods in the first trimester of pregnancy, maternal thyroxine is essential for fetal development as it supplies thyroid hormone-dependent tissues. The ontogeny of mature thyroid function involves organogenesis, and maturation of the hypothalamus, pituitary and the thyroid gland; and it is almost complete by the 12th-14th gestational week. In case of maternal hypothyroidism, substitution with levothyroxine must be started in early pregnancy...
January 19, 2017: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/28074218/-autoimmune-diseases-of-the-thyroid-gland
#2
S Allelein, J Feldkamp, M Schott
Autoimmune diseases of the thyroid gland are considered to be the most frequent cause of thyroid gland disorders. Autoimmune thyroid diseases consist of two subgroups: autoimmune thyroiditis (AIT) and Graves' disease. The AIT is the most common human autoimmune disease. Infiltration of the thyroid gland with cytotoxic T‑cells can lead to an initial thyrotoxicosis und during the course to hypothyroidism due to destruction of the thyroid gland. Substitution with Levothyroxine is indicated for manifest hypothyroidism and subclinical hypothyroidism with increased thyroid antibodies with the intention of normalizing the serum thyroid stimulating hormone (TSH)...
January 2017: Der Internist
https://www.readbyqxmd.com/read/28071990/natural-course-of-euthyroidism-and-clues-for-early-diagnosis-of-thyroid-dysfunctions-tehran-thyroid-study-tts
#3
Atieh Amouzegar, Zahra Ghaemmaghami, Maani Beygi, Safoora Gharibzadeh, Ladan Mehran, Maryam Tohidi, Fereidoun Azizi
OBJECTIVE: Considering the limited data available on the natural course of euthyroidism, this study was designed to evaluate the progression in time from euthyroidism to subclinical or overt hypo - or hyperthyroidism. METHODS: This study was conducted within the framework of the Tehran Thyroid cohort study (TTS), in which 5783 individuals aged 40.4 ± 0.2 years were followed for 6 years. The overall loss to follow-up rate was 8.3%. After applying exclusion criteria, data of 4204 euthyroid subjects remained for analysis of a six-year natural course analysis...
January 10, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28059636/the-effects-of-adequate-iodine-supply-on-the-incidence-of-iodine-induced-thyroid-disorders-in-slovenia
#4
Vid Bajuk, Katja Zaletel, Edvard Pirnat, Sergej Hojker, Simona Gaberšček
BACKGROUND: We aimed to establish the changes in the incidence and characteristics of iodine-induced hyperthyroidism (II-Hyper) and iodine-induced hypothyroidism (II-Hypo) in the two-year period before and the ten-year period after the increase in mandatory salt iodization from the previous 10 mg of potassium iodide to 25 mg per kg in 1999. Furthermore, we aimed at determining the duration of treatment in II-Hyper patients, since no data regarding severity and treatment of II-Hyper with respect to iodine supply are available...
January 6, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28053824/low-normal-tsh-levels-are-associated-with-impaired-bmd-and-hip-geometry-in-the-elderly
#5
Su Jin Lee, Kyoung Min Kim, Eun Young Lee, Mi Kyung Song, Dae Ryong Kang, Hyeon Chang Kim, Yoosik Youm, Young Mi Yun, Hyun-Young Park, Chang Oh Kim, Yumie Rhee
Subclinical hyperthyroidism is known to be associated with the risk of fractures in elderly people. However, there are few studies assessing whether low normal thyroid-stimulating hormone (TSH) levels affect bone density and geometry. Here, we aimed to assess the influence of the TSH level on bone mineral density (BMD) and geometry in elderly euthyroid subjects. This was a cross-sectional cohort study. A total of 343 men and 674 women with euthyroidism were included and analyzed separately. The subjects were divided into tertiles based on the serum TSH level...
December 2016: Aging and Disease
https://www.readbyqxmd.com/read/28049387/stimulation-of-thyroid-function-by-hcg-during-pregnancy-a-risk-factor-for-thyroid-disease-and-a-mechanism-for-known-risk-factors
#6
Tim Korevaar, Yolanda B de Rijke, Layal Chaker, Marco Medici, Vincent Wv Jaddoe, Eric Ap Steegers, Theo J Visser, Robin Peeters
BACKGROUND: Thyroid autoimmunity is a major risk factor for gestational thyroid disease and recently various other risk factors have been identified, including maternal age, BMI and parity. hCG is an important determinant of gestational thyroid function, yet it is unknown to what extent differences in hCG concentration affect the risk for thyroid disease. We have recently shown that TPOAb positivity impairs the thyroidal response to hCG stimulation, which may suggest that this is a mechanism through which thyroid autoimmunity acts as a risk factor for thyroid disease...
January 3, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28029020/clinical-update-in-aspects-of-the-management-of-autoimmune-thyroid-diseases
#7
REVIEW
Duncan J Topliss
Aspects of autoimmune thyroid disease updated in this review include: immunoglobulin G4 (IgG4)-related thyroid disease (Riedel's thyroiditis, fibrosing variant of Hashimoto's thyroiditis, IgG4-related Hashimoto's thyroiditis, and Graves' disease with elevated IgG4 levels); recent epidemiological studies from China and Denmark indicating that excess iodine increases the incidence of Hashimoto's thyroiditis and hypothyroidism; immunomodulatory agents (ipilimumab, pembrolizumab, nivolumab) activate immune response by inhibiting T-cell surface receptors which down-regulate immune response, i...
December 2016: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28028828/thyroid-abnormalities-following-the-use-of-ctla-4-and-pd-1-inhibitors-in-the-treatment-of-melanoma
#8
D L Morganstein, Z Lai, L Spain, S Diem, D Levine, C Mace, M Gore, J Larkin
CONTEXT: Checkpoint inhibitors are emerging as important cancer therapies, but are associated with a high rate of immune side effects, including endocrinopathy. OBJECTIVE: To determine the burden of thyroid dysfunction in patients with melanoma treated with immune checkpoint inhibitors and describe the clinical course. DESIGN AND PATIENTS: Consecutive patients with melanoma treated with either Ipilimumab, Nivolumab, Pembrolizumab or the combination of Ipilimumab and Nivolumab were identified...
December 27, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/28028513/evaluation-of-endothelial-function-in-exogenous-subclinical-hyperthyroidism-and-the-effect-of-treatment
#9
Sayed Mohammad Hosseini, Elham Khosravi Bakhtyari, Kiyan Heshmat-Ghahdarijani, Noushin Khalili
BACKGROUND: Subclinical hyperthyroidism (SHy) is a widespread condition in which cardiovascular manifestations are frequently occur, but there is still a debate about the vascular responsiveness in it. Measuring flow-mediated dilation (FMD) and intimae-media thickness (IMT) are used to evaluate endothelial function in these patients. MATERIALS AND METHODS: Twenty-five patients with a diagnosis of exogenous SHy and 25 full matched healthy subjects were enrolled. At first FMD of brachial artery and IMT of common carotid artery were obtained from all the participants...
2016: Advanced Biomedical Research
https://www.readbyqxmd.com/read/27988318/prevalence-of-thyroid-dysfunction-and-autoimmunity-in-the-older-population-and-implications-of-age-specific-reference-ranges
#10
Flora Veltri, Francisco Oliveira Rocha, Dominique Willems, Jean-Philippe Praet, Lidia Grabczan, Pierre Kleynen, Thierry Pepersack, Kris Poppe
OBJECTIVE: To investigate the prevalence of thyroid dysfunction and autoimmunity (TAI) and to determine age-specific reference ranges in individuals <60 and ≥60-year-old. Furthermore we investigated the impact of the age-specific reference ranges on the prevalence of thyroid dysfunction. DESIGN: Retrospective analysis of laboratory data collected over six months in 2015, mainly from individuals consulting the outpatient clinic. METHOD: Data from 676 individuals were withheld, after having applied strict exclusion criteria to avoid confounders...
December 15, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27959843/-prevalence-of-thyroid-dysfunction-in-patients-with-type-2-diabetes-mellitus
#11
Mirta Centeno Maxzud, Luciana Gómez Rasjido, Mercedes Fregenal, Florencia Arias Calafiore, Mercedes Córdoba Lanus, Marcela D'Urso, Héctor Luciardi
Diabetes mellitus (DM) and thyroid dysfunction (TD) are two common endocrine disorders. The unrecognized subclinical TD may adversely affect metabolic control and increase cardiovascular risk. Our aim was to investigate the prevalence of TD in patients with type 2 diabetes mellitus in an observational cross-sectional study. Clinical and laboratory evaluation was performed to 205 consecutive outpatients at Endocrinology Diabetes and Nutrition Center in Concepcion City, Tucuman, Argentina. Thyroid dysfunction was classified as clinical hypothyroidism with TSH > 4...
2016: Medicina
https://www.readbyqxmd.com/read/27926474/the-association-of-thyroid-function-and-the-risk-of-kidney-function-decline-a-population-based-cohort-study
#12
Layal Chaker, Sanaz Sedaghat, Ewout J Hoorn, Wendy P J Den Elzen, Jacobijn Gussekloo, Albert Hofman, M Arfan Ikram, Oscar H Franco, Abbas Dehghan, Robin P Peeters
OBJECTIVES: Thyroid dysfunction has been associated with kidney function decline, but mainly in cross-sectional studies. Therefore, we aimed to determine the association between thyroid and kidney function in a prospective population-based cohort study longitudinally. DESIGN: Prospective cohort study. METHODS: Participants aged ≥45 years from the Rotterdam Study with thyroid and kidney function assessment were included. Kidney function and new onset chronic kidney disease (CKD) were defined using estimated glomerular filtration ate (eGFR), with CKD defined as eGFR <60 mL/min/1...
December 2016: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27920832/risk-factors-for-amiodarone-induced-thyroid-dysfunction-in-japan
#13
Sayoko Kinoshita, Tomohiro Hayashi, Kyoichi Wada, Mikie Yamato, Takeshi Kuwahara, Toshihisa Anzai, Mai Fujimoto, Kouichi Hosomi, Mitsutaka Takada
BACKGROUND: Amiodarone is associated with a number of significant adverse effects, including elevated transaminase levels, pulmonary fibrosis, arrhythmia, and thyroid dysfunction. Although thyroid dysfunction is considered to be a common and potentially serious adverse effect of amiodarone therapy, the exact pathogenesis remains unknown because of its complex manifestations. Therefore, the prevalence of, and risk factors for, amiodarone-induced thyroid dysfunction in Japanese patients were investigated in the present study...
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27866202/the-evolution-of-thyroid-function-after-presenting-with-hashimoto-thyroiditis-is-different-between-initially-euthyroid-girls-with-and-those-without-turner-syndrome
#14
Malgorzata Wasniewska, Mariacarolina Salerno, Andrea Corrias, Laura Mazzanti, Patrizia Matarazzo, Domenico Corica, Tommaso Aversa, Maria Francesca Messina, Filippo De Luca, Mariella Valenzise
AIM: To prospectively investigate, during a 5-year follow-up, whether the prognosis of thyroid function with Hashimoto thyroiditis (HT) is different in euthyroid girls with Turner syndrome (TS) than in euthyroid girls without TS. DESIGN: In 66 TS girls and 132 non-TS girls with euthyroid HT and similar thyroid functional test results at HT diagnosis, we followed up the evolution of thyroid status over time. RESULTS: At the end of follow-up, the TS girls exhibited higher TSH levels, lower fT4 levels, and lower prevalence rates of both euthyroidism and subclinical hypothyroidism, but higher prevalence rates of both overt hypothyroidism and hyperthyroidism, irrespective of the karyotype...
2016: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/27864708/thyroid-dysfunction-and-kidney-disease-an-update
#15
REVIEW
Pedro Iglesias, María Auxiliadora Bajo, Rafael Selgas, Juan José Díez
Thyroid hormones influence renal development, kidney hemodynamics, glomerular filtration rate and sodium and water homeostasis. Hypothyroidism and hyperthyroidism affect renal function by direct renal effects as well as systemic hemodynamic, metabolic and cardiovascular effects. Hypothyroidism has been associated with increased serum creatinine and decreased glomerular filtration rate. The reverse effects have been reported in thyrotoxicosis. Most of renal manifestations of thyroid dysfunction are reversible with treatment...
November 18, 2016: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/27844210/is-subclinical-hyperthyroidism-a-real-syndrome-different-from-overt-hyperthyroidism
#16
EDITORIAL
Raffaele Giubbini, Alessia Peli
No abstract text is available yet for this article.
November 14, 2016: Endocrine
https://www.readbyqxmd.com/read/27843806/a-2016-italian-survey-about-the-clinical-use-of-selenium-in-thyroid-disease
#17
Roberto Negro, Roberto Attanasio, Franco Grimaldi, Claudio Marcocci, Rinaldo Guglielmi, Enrico Papini
BACKGROUND: Selenium (Se) is a trace element that plays key roles in thyroid physiology. Se deficiency is associated with increased risk of thyroid disease. Some evidence suggests that Se supplementation may be beneficial in autoimmune thyroid disease (either hypo- or hyperthyroidism). OBJECTIVES: We sought to examine the use of Se in daily clinical practice among Italian endocrinologists. METHODS: Members of the Associazione Medici Endocrinologi (AME) were invited to participate in a web-based survey investigating the use of Se in different clinical conditions...
September 2016: European Thyroid Journal
https://www.readbyqxmd.com/read/27835928/population-based-national-prevalence-of-thyroid-dysfunction-in-spain-and-associated-factors-di-bet-es-study
#18
Sergio Valdes, Cristina Maldonado-Araque, Ana Lago-Sampedro, J Antonio Lillo, Eduardo Garcia-Fuentes, Vidal Perez, Carolina Gutierrez-Repiso, Pilar Ocon-Sanchez, Albert Goday-Arno, Ines Urrutia, Laura Pelaez, Alfonso Calle-Pascual, Elena Bordiú, Luis Castaño, Conxa Castell, Elias Delgado Álvarez, Edelmiro Menendez, Josep Franch, Sonia Gaztambide, Joan Girbés, Emilio Ortega, Alfonso Lopez-Alba, Felipe J Chaves, Joan Vendrell, Matilde Rodriguez Chacon, Federico Soriguer, Gemma Rojo-Martinez
BACKGROUND: The aim of this study was to investigate the national prevalence of thyroid dysfunction in Spain, and its association with various clinical, environmental and demographic variables. METHODS: The present report includes 4554 people (42.4% men) with a mean age of 50 years (range 18-93 years) participants in a national, cross-sectional, population-based survey conducted in 2009-10. Data gathered included clinical and demographic characteristics, physical examination and blood sampling...
November 11, 2016: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27818781/subclinical-hypothyroidism-is-an-independent-predictor-of-adverse-cardiovascular-outcomes-in-patients-with-acute-decompensated-heart-failure
#19
Tomohiro Hayashi, Takuya Hasegawa, Hideaki Kanzaki, Akira Funada, Makoto Amaki, Hiroyuki Takahama, Takahiro Ohara, Yasuo Sugano, Satoshi Yasuda, Hisao Ogawa, Toshihisa Anzai
AIMS: Altered thyroid hormone metabolism characterized by a low triiodothyronine (T3), so-called low-T3 syndrome, is a common finding in patients with severe systemic diseases. Additionally, subclinical thyroid dysfunction, defined as abnormal thyroid stimulating hormone (TSH) and normal thyroxine (T4), causes left ventricular dysfunction. Our objective was to identify the prevalence and prognostic impact of low-T3 syndrome and subclinical thyroid dysfunction in patients with acute decompensated heart failure (ADHF)...
September 2016: ESC Heart Failure
https://www.readbyqxmd.com/read/27811932/thyroid-hormones-and-cardiovascular-disease
#20
REVIEW
Avais Jabbar, Alessandro Pingitore, Simon H S Pearce, Azfar Zaman, Giorgio Iervasi, Salman Razvi
Myocardial and vascular endothelial tissues have receptors for thyroid hormones and are sensitive to changes in the concentrations of circulating thyroid hormones. The importance of thyroid hormones in maintaining cardiovascular homeostasis can be deduced from clinical and experimental data showing that even subtle changes in thyroid hormone concentrations - such as those observed in subclinical hypothyroidism or hyperthyroidism, and low triiodothyronine syndrome - adversely influence the cardiovascular system...
January 2017: Nature Reviews. Cardiology
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