scholarly journals Determination of the Thyroid Gland Density in the Differential Diagnosis of Functional Disorders in Patients with Autoimmune Thyroiditis

2019 ◽  
Vol 3 (12) ◽  
pp. 23-26 ◽  
Author(s):  
Ramchandra Sargar ◽  
Irina Kurnikova ◽  
Igor Tomashevskiy
Keyword(s):  
Differential Diagnosis ◽  
Thyroid Gland ◽  
Autoimmune Thyroiditis ◽  
Functional Disorders

scholarly journals Macro-TSH in patients with primary hypothyroidism due to autoimmune thyroiditis

2021 ◽  
Vol 17 (4) ◽  
pp. 17-20
Author(s):  
A. G. Saribekian ◽  
D. A. Petrenko ◽  
D. A. Trukhina ◽  
A. G. Kuzmin ◽  
L. K. Dzeranova ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Thyroid Gland ◽  
Autoimmune Thyroiditis ◽  
Thyroid Dysfunction ◽  
Clinical Manifestations ◽  
Thyroid Stimulating Hormone ◽  
Primary Hypothyroidism ◽  
Common Phenomenon ◽  
Functional Disorders ◽  
Key Indicators

Thyroid stimulating hormone (TSH) is one of the key indicators in the diagnosis of the thyroid gland functional disorders. Minor changes in TSH concentration make it possible to suspect thyroid dysfunction even before clinical manifestations, which increases the value of correct and timely measurement of it. In the clinical practice, an endocrinologist often encounter the well-known phenomenon of macroprolactinemia; a much less common phenomenon is macrotyrotropinemia (macro-TSH). The presence of macro-TSH complexes can be suspected when the serum detects atypically high TSH values with reference values of FT4 without any signs of hypothyroidism. Since the phenomenon is based on an autoimmune mechanism, macro-TSH can often be detected in patients with autoimmune thyroiditis (AIT). This article presents clinical cases of patients with a combination of the macro-TSH phenomenon and primary hypothyroidism due to AIT.

scholarly journals THE DETERMINATION OF THYROXINE IN THE THYROID GLAND OF THE RAT

1946 ◽  
Vol 163 (1) ◽  
pp. 323-328
Author(s):  
Alvin Taurog ◽  
I.L. Chaikoff
Keyword(s):  
Thyroid Gland

IMPORTANCE OF ANTIBODIES TO 21-HYDROXYLASE FOR THE DIAGNOSIS, DIFFERENTIAL DIAGNOSIS AND PROGNOSIS OF AUTOIMMUNE CHRONIC PRIMARY ADRENAL INSUFFICIENCY

2021 ◽  
Vol 100 (2) ◽  
pp. 78-86
Author(s):  
L.S. Sozaeva ◽  
◽  
N.V. Makazan ◽  
L.V. Nikankina ◽  
N.M. Malysheva ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Adrenal Insufficiency ◽  
Predictive Value ◽  
Primary Adrenal Insufficiency ◽  
Polyglandular Autoimmune Syndrome ◽  
Diagnosis And Prognosis ◽  
Specificity And Sensitivity ◽  
Enzymelinked Immunosorbent Assay

21-hydroxylase (21-OH) is the main antigen of the adrenal cortex, so the determination of antibodies (Ab) to 21-OH can help in the diagnosis and prognosis of chronic primary adrenal insufficiency (CPAI). Purpose of the study: evaluation of the relevance of Ab to 21-OH for the diagnosis and prediction of autoimmune CPAI. Materials and methods of research: the study consisted of three blocks: 1) assessment of the specificity and sensitivity, as well as the prognostic potential of Ab to 21-OH in patients with polyglandular autoimmune syndrome (APS) – individuals with APS type 1 with and without CPAI (n=106); 2) assessment of the dynamics of the level of Ab to 21-OH – patients with autoimmune CPAI were included (n=41); 3) assessment of the significance of Ab data for the differential diagnosis of various forms of CPAI, including patients with CPAI and APS type 1 exclusion (n=30). The study of Ab to 21-hydroxylase was performed using enzymelinked immunosorbent assay (BioVendor kits, Czech Republic). Results: statistically significant differences were obtained in the frequency of detection of Ab to 21-OH in patients with or without PCNI (p<0,001). The sensitivity of the method was 96%, specificity was 75%, a positive predictive value was 90%, and the negative predictive value was 89%. In 83% of patients, the level of Ab decreased with time (median size decreases – 20,4%/year). An inverse relationship was also found between the level of Ab and the duration of the course of CPAI (R=–0,460, p<0,001). In a group of 30 patients with CPAI and with exclusion of APS type 1, 21 were found to have Ab to 21-OH, only one of them had a monogenic non-autoimmune cause of CPAI (a mutation in the MC2R gene). Monogenic forms of CPAI were found in another 7 patients (mutations were found in the DAX1 and ABCD1 genes), among them an increase in Ab to 21-OH was not detected. Conclusion: determination of Ab to 21-OH is a specific and sensitive method for the diagnosis of autoimmune CPAI. An increase in Ab to 21-OH is a risk marker of autoimmune CPAI development.

scholarly journals Measurement of Urinary d- and l-2-Hydroxyglutarate Enantiomers by Stable-Isotope-Dilution Liquid Chromatography–Tandem Mass Spectrometry after Derivatization with Diacetyl-l-Tartaric Anhydride

2004 ◽  
Vol 50 (8) ◽  
pp. 1391-1395 ◽  
Author(s):  
Eduard A Struys ◽  
Erwin E W Jansen ◽  
Nanda M Verhoeven ◽  
Cornelis Jakobs
Keyword(s):  
Mass Spectrometry ◽  
Differential Diagnosis ◽  
Liquid Chromatography ◽  
Stable Isotope ◽  
Tandem Mass Spectrometry ◽  
Tandem Mass ◽  
Internal Standards ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Abstract Background: The differential diagnosis of d-2-hydroxyglutaric aciduria (d-2-HGA), l-2-hydroxyglutaric aciduria (l-2-HGA), and the combined d/l-2-hydroxyglutaric aciduria (d/l-2-HGA) can be accomplished only by the measurement of the corresponding 2-hydroxyglutarate (2-HG). Available methods for the determination of d- and l-2-HG in urine are either time-consuming and expensive or have not been extensively validated. We aimed to develop a method for their rapid and sensitive measurement. Methods: We used liquid chromatography–tandem mass spectrometry (LC-MS/MS) for the determination of d- and l-2-HG with stable-isotope-labeled internal standards. Urine samples of 20 μL were mixed with 250 μL of methanol containing the internal standards and subsequently dried under nitrogen. The analytes were derivatized by use of diacetyl-l-tartaric anhydride (DATAN) to obtain diastereomers, which were separated on an achiral C18 HPLC column and detected by MS/MS in multiple-reaction-monitoring mode. Results: The use of DATAN as chiral derivatization reagent provided very well separated peaks of the formed diastereomers of d- and l-2-HG, with a total runtime of 5 min. The inter- and intraassay CVs for d- and l-2-HG ranged from 3.4% to 6.2%. Mean recoveries of d- and l-2-HG, evaluated on two concentrations, were 94%. Detection limit of the presented method was 20 pmol for a sample volume of 20 μL. Method comparison of the LC-MS/MS method with a gas chromatography–mass spectrometry method, in which d- and l-2-HG were derivatized with R-(−)-butanol, showed good agreement between the two methods. Conclusions: Urinary d- and l-2-HG can be analyzed by MS/MS after derivatization with DATAN. The presented method may be suitable for the differential diagnosis of 2-HGA.

scholarly journals DEVELOPMENT OF FLOW INJECTION METHOD FOR ONLINE DETERMINATION OF THIOCYANATE BASED ON OXIDATION BY PERMANGANATE

2010 ◽  
Vol 10 (2) ◽  
pp. 167-171 ◽  
Author(s):  
Hermin Sulistyarti ◽  
Spas D. Kolev ◽  
Stephanie Lim
Keyword(s):  
Detection Limit ◽  
Thyroid Gland ◽  
Flow Injection ◽  
Hydrogen Cyanide ◽  
Figures Of Merit ◽  
Sample Throughput ◽  
Teflon Membrane ◽  
Developing Method ◽  
Analytical Figures Of Merit

The importance of developing method for thiocyanate becomes obvious, because thiocyanate can inhibit iodine uptake of thyroid gland leading to mumps disease. In this work, thiocyanate is oxidized by permanganate in the acid donor stream to cyanide, which is directly converted to hydrogen cyanide. Then, hydrogen cyanide diffuses through a Teflon membrane into acceptor stream containing nickel(II) in ammoniacal buffer to form tetracyanonickelate(II) which is detected spectrophotometrically at 267 nm. Analytical figures of merit were linear up to 50 mg L-1 for thiocyanate, with RSD of 1.34%, and detection limit of 0.07 mg L-1, respectively. Interfering anions were eliminated under stoichiometric amount of permanganate and sample throughput was 20 h-1. The method was validated for determining thiocyanate samples from synthetic and gold process waters with satisfactory results.   Keywords: Thiocyanate, flow injection, permanganate, spectrophotometry

scholarly journals Normocytic Normochromic Anemia Revealed an Early Onset Hashimoto’s Hypothyroidism in an Infant: A Case Report

2021 ◽  
pp. 1-5
Author(s):  
Manal Mustafa Khadora ◽  
Maysa Saleh ◽  
Rawah Idres ◽  
Sura Ahmed Al-Doory ◽  
Mahmoud Ahmed Radaideh
Keyword(s):  
Differential Diagnosis ◽  
Case Report ◽  
Autoimmune Thyroiditis ◽  
Subclinical Hypothyroidism ◽  
Early Onset ◽  
Clinical Presentation ◽  
Primary Hypothyroidism ◽  
Normocytic Normochromic Anemia ◽  
Wide Range ◽  
Normochromic Anemia

Autoimmune thyroiditis is very rare etiology of primary hypothyroidism in infancy. Hypothyroidism has a wide range of clinical presentation, from subclinical hypothyroidism to overt type. It is unclear what pathological mechanisms connect thyroid function and erythropoiesis or how thyroid disease can contribute to anemia. We report a 12-month-old infant who presented with anemia associated with early onset of overt autoimmune thyroiditis. The peculiarity of our case enables us to draw attention of physician to consider acquired hypothyroidism in the differential diagnosis of unexplained anemia even if the neonatal screening is normal and congenital hypothyroidism is a remote possibility.

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