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Thyroid hormone replacement

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https://www.readbyqxmd.com/read/28433882/hypothyroidism-following-allogeneic-hematopoietic-stem-cell-transplantation-for-acute-myeloid-leukemia
#1
Michael Medinger, Deborah Zeiter, Dominik Heim, Jörg Halter, Sabine Gerull, André Tichelli, Jakob Passweg, Nicole Nigro
BACKGROUND: Hypothyroidism may complicate allogeneic hematopoietic stem cell transplantation (allo-HSCT); we therefore analyzed risk factors in this study. PATIENTS AND METHODS: We studied 229 patients with acute myeloid leukemia (AML) who underwent an allo-HSCT between 2003 and 2013 with different conditioning regimens (myeloablative, reduced-intensity, chemotherapy-based, or total body irradiation-based). Thyroid-stimulating hormone (TSH) and free thyroxine levels (fT4) were available in 104 patients before and after allo-HSCT...
April 13, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28407667/monitoring-thyroid-function-in-patients-on-levothyroxine-assessment-of-conformity-to-national-guidance-and-variability-in-practice
#2
Jonathan J Scargill, Mark Livingston, David Holland, Christopher J Duff, Anthony A Fryer, Adrian H Heald
With demand for endocrine tests steadily increasing year-on-year, we examined thyroid function test (TFT) frequencies in patients on levothyroxine replacement therapy to assess the effect of initial TFT results and request source on TFT re-testing interval. All TFTs performed by the Clinical Biochemistry Departments at the Salford Royal Hospital (2009-2012; 288 263 requests from 139 793 patients) and University Hospital of North Midlands (2011-2014; 579 156 requests from 193 035 patients) were extracted from the laboratory computer systems...
April 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28398655/seasonal-variations-in-tsh-serum-levels-in-athyreotic-patients-under-l-thyroxine-replacement-monotherapy
#3
Damiano Gullo, Adele Latina, Francesco Frasca, Sebastiano Squatrito, Antonino Belfiore, Riccardo Vigneri
BACKGROUND: Whether serum TSH undergoes seasonal fluctuations in euthyroid and hypothyroid residents of temperate climates is controversial. METHODS: Monthly TSH and thyroid hormone levels were cross-sectionally analyzed in a large cohort of euthyroid subjects (n=11,806) and L-thyroxine (L-T4)-treated athyreotic patients (n=3,934). Moreover, in a small group (n=119) of athyreotic patients treated with an unchanged dosage of L-T4 monotherapy, hormones were measured both in the coldest and the hottest seasons of the same year (longitudinal study)...
April 11, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28391432/thyroxine-exposure-effects-on-the-cranial-base
#4
Emily Durham, R Nicole Howie, Trish Parsons, Grace Bennfors, Laurel Black, Seth M Weinberg, Mohammed Elsalanty, Jack C Yu, James J Cray
Thyroid hormone is important for skull bone growth, which primarily occurs at the cranial sutures and synchondroses. Thyroid hormones regulate metabolism and act in all stages of cartilage and bone development and maintenance by interacting with growth hormone and regulating insulin-like growth factor. Aberrant thyroid hormone levels and exposure during development are exogenous factors that may exacerbate susceptibility to craniofacial abnormalities potentially through changes in growth at the synchondroses of the cranial base...
April 8, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28368265/neurodevelopmental-outcome-of-children-with-congenital-hypothyroidism-diagnosed-in-a-national-screening-program-in-turkey
#5
Bahar Toklu Baysal, Bora Baysal, Ferah Genel, Baris Erdur, Erhan Ozbek, Korcan Demir, Behzat Ozkan
OBJECTIVE: To study the factors affecting a neurodevelopmental status of children with congenital hypothyroidism, diagnosed on national screening program. METHODS: The study was performed in the Pediatric Endocrinology Department of Dr. Behcet Uz Children's Hospital between May 2012 and May 2013. Children with congenital hypothyroidism, aged between 24 and 36 months, diagnosed by national screening program were included in the study group. Healthy subjects at the same age group consisted of the control group...
March 29, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28365624/getting-to-the-heart-of-hypopituitarism
#6
Julie Martin-Grace, Mohamed Ahmed, Niall Mulvihill, Eoin R Feeney, Rachel K Crowley
A 53-year-old woman was diagnosed with hypopituitarism following an acute presentation with cardiac tamponade and hyponatraemia, having recently been investigated for a pericardial effusion. Secondary hypothyroidism is a rare cause of pericardial effusion and tamponade, but an important differential to consider. Management requires appropriate hormone replacement and, critically, a low threshold for commencing stress dose steroids. Clinical signs classically associated with cardiac tamponade are frequently absent in cases of tamponade due to primary and secondary hypothyroidism, and the relatively volume deplete state of secondary hypoadrenalism in hypopituitarism may further mask an evolving tamponade, as the rise in right atrial pressure is less marked even in the presence of large effusion...
April 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28363614/acute-symptomatic-hypocalcemia-from-immune-checkpoint-therapy-induced-hypoparathyroidism
#7
Myint Aung Win, Kyaw Zin Thein, Aiham Qdaisat, Sai-Ching Jim Yeung
BACKGROUND: Ipilimumab (a monoclonal antibody against CTLA-4) and nivolumab (a humanized antibody against PD-1) target these immune checkpoint pathways and are used for treatment of melanoma and an increasing number of other cancers. However, they may cause immune-related adverse effects (IRAEs). Although many endocrinopathies are known to be IRAEs, primary hypoparathyroidism with severe hypocalcemia has never been reported. This is the first case of hypoparathyroidism as an IRAE presenting to an Emergency Department with acute hypocalcemia...
February 27, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28356660/prevalence-of-hypothyroidism-in-nondiabetic-chronic-kidney-disease-and-effect-of-thyroxine-replacement-on-estimated-glomerular-filtration-rate
#8
S Bajaj, N Purwar, A Gupta, P Gupta, A Srivastava
Reduced T3 and free T4, elevated thyroid stimulating hormone, and hyporesponsiveness to thyrotropin releasing hormone raise questions about the presence of hypothyroidism in chronic kidney disease (CKD) and raise the possibility of benefit from thyroxine supplementation. A prospective cohort study was conducted on 73 nondiabetic CKD cases. Hypothyroid patients were started on levothyroxine and were reviewed after 3 and 6 months. The mean age of study population was 42.3 ± 16.8 years. Of the total population, 32 (43...
March 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28339047/hypothalamo%C3%A2-hypophysial-system-in-rats-with-autotransplantation-of-the-adrenal-cortex
#9
Nae Takizawa, Susumu Tanaka, Souichi Oe, Taro Koike, Tadashi Matsuda, Hisao Yamada
Patients with bilateral pheochromocytoma often require an adrenalectomy. Autotransplantation of the adrenal cortex is an alternative therapy that could potentially be performed instead of receiving glucocorticoid replacement following adrenalectomy. Adrenal cortex autotransplantation aims to avoid the side effects of long‑term steroid treatment and adrenal insufficiency. Although the function of the hypothalamo‑hypophysial system is critical for patients who have undergone adrenal cortex autotransplantation, the details of that system, with the exception of adrenocorticotropic hormone in the subjects with adrenal autotransplantation, have been overlooked for a long time...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28336049/hypothyroidism
#10
REVIEW
Layal Chaker, Antonio C Bianco, Jacqueline Jonklaas, Robin P Peeters
Hypothyroidism is a common condition of thyroid hormone deficiency, which is readily diagnosed and managed but potentially fatal in severe cases if untreated. The definition of hypothyroidism is based on statistical reference ranges of the relevant biochemical parameters and is increasingly a matter of debate. Clinical manifestations of hypothyroidism range from life threatening to no signs or symptoms. The most common symptoms in adults are fatigue, lethargy, cold intolerance, weight gain, constipation, change in voice, and dry skin, but clinical presentation can differ with age and sex, among other factors...
March 20, 2017: Lancet
https://www.readbyqxmd.com/read/28327186/clinical-behavioural-and-pharmacogenomic-factors-influencing-the-response-to-levothyroxine-therapy-in-patients-with-primary-hypothyroidism-protocol-for-a-systematic-review
#11
Rosie Dew, Onyebuchi Okosieme, Colin Dayan, Vinay Eligar, Ishrat Khan, Salman Razvi, Simon Pearce, Scott Wilkes
BACKGROUND: Suboptimal thyroid hormone therapy including under-replacement and over-replacement is common amongst patients with hypothyroidism. This is a significant health concern as affected patients are at risk of adverse cardiovascular or metabolic consequences. Despite a growing body of evidence on the effects of various factors on thyroid hormone replacement, a systematic appraisal of the evidence is lacking. This review aims to appraise and quantify the extent to which clinical, behavioural and pharmacogenomic factors affect levothyroxine therapy in patients with primary hypothyroidism...
March 21, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28324106/clinical-features-of-early-and-late-postoperative-hypothyroidism-after-lobectomy
#12
Suyeon Park, Min Ji Jeon, Eyun Song, Hye-Seon Oh, Mijin Kim, Hyemi Kwon, Tae Yong Kim, Suck Joon Hong, Young Kee Shong, Won Bae Kim, Tae-Yon Sung, Won Gu Kim
Context: Lobectomy is preferred in thyroid cancer to decrease surgical complications and avoid lifelong thyroid-hormone replacement. However, postoperative hypothyroidism, requiring thyroid-hormone replacement, may occur. Objective: We aimed to identify the incidence and risk factors of postoperative hypothyroidism to develop a surveillance strategy after lobectomy for papillary thyroid microcarcinoma (PTMC). Methods: This historical cohort study involved 335 patients with PTMC treated by lobectomy...
April 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324063/dio2-thr92ala-reduces-deiodinase-2-activity-and-serum-t3-levels-in-thyroid-deficient-patients
#13
M G Castagna, M Dentice, S Cantara, R Ambrosio, F Maino, T Porcelli, C Marzocchi, C Garbi, F Pacini, D Salvatore
Context: A significant proportion of athyreotic LT4-treated patients experience hypothyroid-like symptoms. During LT4 replacement, levels of the active hormone triiodothyronine (T3) strictly depend on type-2-deiodinase (D2)-mediated activation of LT4. The Thr92Ala polymorphism and the 258 G/A in the DIO2 gene have been associated with various clinical conditions. Objectives: To investigate the effects of DIO2 polymorphisms in thyroid hormone homeostasis. Design: We compared the pre-surgical hormonal status of thyroidectomized LT4-treated patients who had a similar TSH level, to their post-surgery status, and analyzed their DIO2 genotype in a subgroup of 102/140 (72...
February 2, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28320137/what-increases-the-risk-of-malnutrition-in-parkinson-s-disease
#14
Svetlana Tomic, Vlasta Pekic, Zeljka Popijac, Tomislav Pucic, Marta Petek, Tihana Gilman Kuric, Sanja Misevic, Ruzica Palic Kramaric
Parkinson's disease (PD) patients are at a higher risk of malnutrition. The prevalence has been estimated to 0-24%, while 3%-60% of PD patients are reported to be at risk of malnutrition. To date, there is no clear explanation for malnutrition in these patients. The aim of this study was to determine the prevalence of malnutrition and to analyze factors that influence its appearance. The Mini Nutritional Assessment (MNA) was used to determine normal nutritional status; at risk of malnutrition; and already malnourished status...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319287/iatrogenic-thyrotoxicosis-and-the-role-of-therapeutic-plasma-exchange
#15
Kabeer K Shah, Michael M Mbughuni, Edwin A Burgstaler, Darci R Block, Jeffrey L Winters
Thyroid storm or severe thyrotoxicosis results from extreme thyroid hormone elevation. Therapy includes medical management to prevent hormone production, release, recycling, and peripheral conversion while stabilizing adrenergic tone. Thyroid dysfunction is the usual cause but it can be due to excessive thyroid hormone ingestion. Therapeutic plasma exchange (TPE) has been used to rapidly remove protein-bound thyroid hormone. American Society for Apheresis guidelines make a weak recommendation to perform TPE in selected patients in the treatment of thyrotoxicosis based on low quality evidence...
March 20, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28291505/the-high-prevalence-of-reversible-subclinical-hypothyroidism-with-elevated-serum-thyroglobulin-levels-in-chronic-kidney-disease-patients%C3%A2
#16
Toru Sanai, Ken Okamura, Shuichi Rikitake, Makoto Fukuda, Koji Onozawa, Mai Sanematsu, Tsuyoshi Takashima, Motoaki Miyazono, Yuji Ikeda
BACKGROUND: We examined the thyroid function of non-dialysis-dependent chronic kidney disease (CKD) patients in Japan. METHODS: Serum-free thyroxine, free triiodothyronine, thyroid-stimulating hormone (TSH), and thyroglobulin (Tg) levels were evaluated in 37 CKD patients. CKD was defined as sustained kidney damage for more than 3 months and was classified as CKD 1+2 (n = 11), 3+4 (n = 10), or 5 (n = 16), which were defined by glomerular filtration rates of ≥ 60, 15 - 59, or < 15 mL/min/1...
May 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28287838/renal-function-improves-with-the-treatment-of-hypothyroidism
#17
Oktay Bulur, Kursat Dal, Derun Taner Ertugrul, Murat Eser, Fatma Kaplan Efe, Serdar Karakaya, Kubilay Şahin, Salih Baser, Naim Ata, Aysun Aybal Kutlugun, Esin Beyan
BACKGROUND: It has been known that thyroid hormones may affect renal function. In this study, we aimed to investigate the effect of levothyroxine replacement on renal function in hypothyroid patients before and after treatment. METHODS: We retrospectively investigated free T3 (fT3), free T4 (fT4), TSH, creatinine, and eGFR measurements during both hypothyroid and euthyroid states of hypothyroid patients. The eGFR was calculated using the simplified Modification of Diet in Renal Disease formula...
March 13, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28286688/beneficial-effects-on-pregnancy-outcomes-of-thyroid-hormone-replacement-for-subclinical-hypothyroidism
#18
Norman J Blumenthal, Creswell J Eastman
Background. Hypothyroidism and raised thyroid antibody levels have been associated with adverse obstetrical outcomes. Several studies have investigated causal associations, but results have been inconsistent and few studies have reported the effects of thyroxine replacement therapy on pregnancy outcomes in hypothyroid patients. Objective. The primary study objective was to determine the outcome of pregnancies in women diagnosed with overt and subclinical hypothyroidism (SCH) (serum TSH > 2.5 mIU/L) and those with elevated circulating thyroid autoantibody levels in the first trimester of pregnancy and after the institution of appropriate thyroxine replacement therapy to maintain the serum TSH ≤ 2...
2017: Journal of Thyroid Research
https://www.readbyqxmd.com/read/28283939/high-dose-of-radioactive-iodine-per-se-has-no-effect-on-glucose-metabolism-in-thyroidectomized-rats
#19
Roghaieh Samadi, Mahboubeh Ghanbari, Babak Shafiei, Sevda Gheibi, Fereidoun Azizi, Asghar Ghasemi
PURPOSE: Thyroid concentrates radioactive iodine by sodium-iodide symporter; this is used for treating hyperthyroidism and thyroid cancer. Pancreas expresses NIS and radioactive iodine uptake may damage pancreatic beta-cells and predispose patients to type 2 diabetes. The aim of this study was to determine whether radioactive iodine is associated with glucose metabolism in thyroidectomized rats. METHODS: Forty male Wistar rats were divided into four groups (n = 10/each); control, thyroidectomized, thyroidectomized-treated with 131-I (TX+I), and thyroidectomized-treated with 131-I and L-thyroxine (TX+I+T4)...
May 2017: Endocrine
https://www.readbyqxmd.com/read/28273204/is-there-an-association-between-thyroid-function-abnormalities-and-breast-cancer
#20
Anna Angelousi, Evanthia Diamanti-Kandarakis, Evangelia Zapanti, Afroditi Nonni, Eftuxios Ktenas, Aimilia Mantzou, Konstantinos Kontzoglou, Grigorios Kouraklis
Objective: The aim of this study was to evaluate the association between thyroid function abnormalities and breast cancer and, in particular, the prognostic markers of breast cancer.. Subjects and methods: Baseline levels of thyrotropin, free triiodothyronine, free thyroxine and thyroid autoantibodies were measured in 97 women with primary breast cancer, 27 women with benign breast disease, and 4 women with atypical ductal hyperplasia. Their baseline levels were compared with those in 48 healthy women with a normal mammography in the last 2 years...
January 2017: Archives of Endocrinology and Metabolism
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