scholarly journals Serum Selenium Status and Its Interrelationship with Serum Biomarkers of Thyroid Function and Antioxidant Defense in Hashimoto’s Thyroiditis

Antioxidants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1070
Author(s):  
Rahim Rostami ◽  
Sarmad Nourooz-Zadeh ◽  
Afshin Mohammadi ◽  
Hamid Reza Khalkhali ◽  
Gordon Ferns ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Hashimoto’S Thyroiditis ◽  
Antioxidant Defense ◽  
Thyroid Volume ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Urinary Iodine Concentration ◽  
Serum Selenium ◽  
Se Deficiency ◽  
Se Status

Selenium (Se) deficiency has been implicated in the pathogenesis of Hashimoto’s thyroiditis (HT), although the available evidence is limited. The present study aimed to explore the interrelationships between serum Se status with measures of thyroid function and antioxidant defense in new cases of HT patients with hypoechogenic thyroid. HT patients (n = 49) and matched controls (n = 50) were recruited. Selenium, thyroid hormone panel, thyroid volume (TVol), glutathione (GSH), glutathione peroxidase3 (GPx3) activity, urinary iodine concentration (UIC), and urinary creatinine (Cr) were assessed. HT patients exhibited lower Se levels compared to controls (p < 0.001) with the rates of Se-deficient (<0.85 µmol/L) participants being 58.8% and 34%, respectively. Se-deficient patients exhibited higher thyroid stimulating hormone (TSH), Thyroid volume (TVol), thyroglobulin, antibody-titers, GPx3 activity and UIC/Cr compared to Se-sufficient patients (all p < 0.001). In the Se-deficient patients, inverse correlations were seen between Se-levels with TSH, TVol, and Thyroid peroxidase antibody (TPO-Ab) (all p < 0.001). This study is the first to uncover that coexisting Se-deficiency and elevated iodine in HT may enhance autoimmune reactions and accelerate the deterioration of thyroid function through oxidative stress. Our study also highlights the importance of optimal Se status in this disease, thus providing a rationale for the execution of intervention trials for the evaluation of the clinical benefits of antioxidant-status improvement in HT.

scholarly journals Effect of small doses of iodine on thyroid function in patients with Hashimoto's thyroiditis residing in an area of mild iodine deficiency

1998 ◽  
pp. 23-28 ◽  
Author(s):  
W Reinhardt ◽  
M Luster ◽  
KH Rudorff ◽  
C Heckmann ◽  
S Petrasch ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Thyroid Function ◽  
Iodine Deficiency ◽  
Subclinical Hypothyroidism ◽  
Hashimoto’S Thyroiditis ◽  
Thyroid Volume ◽  
Treated Group ◽  
Hashimoto's Thyroiditis ◽  
Control Group ◽  
Small Doses

OBJECTIVE: Several studies have suggested that iodine may influence thyroid hormone status, and perhaps antibody production, in patients with autoimmune thyroid disease. To date, studies have been carried out using large amounts of iodine. Therefore, we evaluated the effect of small doses of iodine on thyroid function and thyroid antibody levels in euthyroid patients with Hashimoto's thyroiditis who were living in an area of mild dietary iodine deficiency. METHODS: Forty patients who tested positive for anti-thyroid (TPO) antibodies or with a moderate to severe hypoechogenic pattern on ultrasound received 250 microg potassium iodide daily for 4 months (range 2-13 months). An additional 43 patients positive for TPO antibodies or with hypoechogenicity on ultrasound served as a control group. All patients were TBII negative. RESULTS: Seven patients in the iodine-treated group developed subclinical hypothyroidism and one patient became hypothyroid. Three of the seven who were subclinically hypothyroid became euthyroid again when iodine treatment was stopped. One patient developed hyperthyroidism with a concomitant increase in TBII titre to 17 U/l, but after iodine withdrawal this patient became euthyroid again. Only one patient in the control group developed subclinical hypothyroidism during the same time period. All nine patients who developed thyroid dysfunction had reduced echogenicity on ultrasound. Four of the eight patients who developed subclinical hypothyroidism had TSH concentrations greater than 3 mU/l. In 32 patients in the iodine-treated group and 42 in the control group, no significant changes in thyroid function, antibody titres or thyroid volume were observed. CONCLUSIONS: Small amounts of supplementary iodine (250 microg) cause slight but significant changes in thyroid hormone function in predisposed individuals.

scholarly journals SAT-497 Conversion of Hashimoto’s Thyroiditis to Grave’s Disease: A Case Report

2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Tayba S Wahedi ◽  
Najah Younes Douba
Keyword(s):  
Thyroid Function ◽  
Hashimoto’S Thyroiditis ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Autoimmune Thyroid ◽  
Grave’S Disease ◽  
Thyroid Uptake ◽  
Common Causes ◽  
Grave's Disease ◽  
Tsh Levels

Abstract Introduction: Hashimoto’s thyroiditis and Grave’s disease are common causes for autoimmune thyroid disease. Conversion from Grave’s disease to hypothyroidism have been previously reported in literature. But development of Grave’s disease after a long standing hypothyroidism rarely occurs.Case report: a 22 -year-old Saudi pregnant female patient, was diagnosed with subclinical hypothyroidism with positive anti -thyroid peroxidase antibodies (Anti-TPO) in 2009. She was started on thyroxin and eventually became euthyroid with normal TSH levels till 2016. During subsequent follow-ups, patient was increasingly complaining of palpitations, weight loss and fine tremors. Thyroid function revealed increasingly suppressed TSH levels and over-replacement was suspected. Thyroxin dose was then gradually reduced and finally stopped for few months. Yet her symptoms persisted. Repeated thyroid function showed suppressed TSH level and elevated T4, T3 levels in keeping with overt hyperthyroidism. Thyroid scan further confirmed the diagnosis with diffuse thyroid uptake suggestive of Grave’s disease.Patient was started on medical treatment initially, then successfully treated with radioactive ablation.Conclusion: Although it rarely occurs, possibility of conversion from hypothyroidism to hyperthyroidism should always be kept in mind while treating hypothyroid patients with persistent clinical or biochemical evidence of hyperthyroidism despite dose reduction.References:[1] McLachlan SM. Rapoport B. Thyrotropin-blocking autoantibodies and thyroid-stimulating autoantibodies: Potential mechanisms involved in the pendulum swinging from hypothyroidism to hyperthyroidism or vice versa. Thyroid. 2013;23(1):14-24.[2] Ohye H, Nishihara E, Sasaki I, et al. Four cases of Graves’ disease which developed after painful Hashimoto’s thyroiditis. Intern Med. 2006;45(6):385-9.

Comparison of the sonography index of thyroid gland with serum level of Anti-thyroid peroxidase, Anti-thyroglobulin and thyroid function test in patients with Hashimoto thyroiditis

2021 ◽  
Author(s):  
Fatemeh Eftekharian ◽  
Gholamhossein Ranjbar Omrani ◽  
Mohammad Hossein Dabbaghmanesh ◽  
Reza Sahraei ◽  
Marzieh Bakhshayeshkaram ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Hashimoto’S Thyroiditis ◽  
Thyroid Volume ◽  
Thyroid Function Test ◽  
Serum Levels ◽  
Significant Negative Correlation ◽  
Thyroid Stimulating Hormone ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Antibody Titers

Abstract Background The purpose of this study was to determine the association of sonographic parameters with the serum levels of anti-thyroid peroxidase (TPO), anti-thyroglobulin (Tg), and thyroid hormones in patients with Hashimoto's thyroiditis. Methods 149 patients (118 females, 31 males; aged 18–60 years; mean age: 38.60 ± 8.03 years) who were diagnosed with Hashimoto's thyroiditis were enrolled in the study. Blood sample was taken to measure the serum levels of free T3 and T4, thyroid stimulating hormone (TSH), anti-TPO antibody titers, and anti-Tg antibody titers. The thyroid sonography of each patient was classified into one of the five grades by real-time ultrasonography (US) based on echogenicity, thyroid size, and thyroid pattern. We evaluated whether a correlation existed between thyroid characteristics on US and serum levels of thyroid hormones, anti-TPO and anti-Tg. Results Nodular structures were detected in 54 (36.2%) patients (38 micronodular and 16 macros nodular). Echogenicity was recorded as isoechoic in 15 (10.07%) and hypoechoic in 119 (79.87%) subjects. Euthyroid ‎subjects had significantly thicker isthmus than overt and subclinical hypothyroid patients (p = 0.018). Mean serum TSH, anti-Tg and anti-TPO titers was significantly higher in patients with micronodules than those with micronodules and subjects without nodules (P < 0.05). Isthmus thickness had a significant negative correlation with FT4 and FT3 (P = 0.046; r = 0.11& P = 0.017; r = 0.15, respectively). Thyroid autoantibodies had positive significant correlations with different parameters of the thyroid volume (P < 0.05). Conclusions Thyroid’s US findings in addition to serum levels of anti-Tg and anti-TPO titers would be useful in diagnosis and evaluation of the severity and extent of Hashimoto's thyroiditis, but further evaluations are needed. Trial registration: Trial registry identifier IR.SUMS.REC.1395.S161 (2015/11/30).

scholarly journals Cytomorphologic spectrum of Hashimoto's thyroiditis and its clinical correlation: A retrospective study of 52 patients

CytoJournal ◽  
2014 ◽  
Vol 11 ◽  
pp. 9 ◽  
Author(s):  
Shirish S. Chandanwale ◽  
Charusheela R. Gore ◽  
Sunita A. Bamanikar ◽  
Nidhi Gupta ◽  
Kanika Gupta
Keyword(s):  
Thyroid Function ◽  
Hashimoto’S Thyroiditis ◽  
Lymphocytic Infiltration ◽  
Needle Aspiration ◽  
Clinical Findings ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Follicular Hyperplasia ◽  
Number Of Patients ◽  
Antibody Profile

Background: Hashimoto's thyroiditis (HT) is an autoimmune disease and it is more prevalent in Asians. The incidence of HT seems to be increasing in the recent times. It is one of the most common cause of hypothyroidism. The purpose of this study is to review the cytomorphologic spectrum of HT and correlate it with clinical findings including thyroid function and antibody profile. Materials and Methods: We retrospectively analyzed the fine-needle aspiration (FNA) features of 52 HT patients. Based on cytomorphologic features patients were categorized into three groups. Clinical findings including thyroid function and thyroid peroxidase (TPO) antibody profile were correlated with cytomorphologic features in all three groups. Results: Majority of the patients were females and in 2nd, 3rd and 4th decades. Diffuse goiter and thyroid hypofunction were the common findings. Significant number of patients had thyroid hyperfunction. Increased lymphocytes on the background and lymphocytic infiltration of thyroid follicular cell clusters in cytology smears were diagnostic of HT. The 32 patients showed elevated titers of TPO antibodies. In the early stages and mild form of the disease, results of thyroid function and anti TPO antibodies are quite variable. Conclusions: HT is a disease of young and middle age and mostly occur in females. Clinical findings alone may not be adequate for definitive diagnosis. FNA is the gold standard for diagnosis. In the presence of abundant colloid, follicular hyperplasia or co-existing neoplasm, careful interpretation of cytology smears should be done. Aspiration from more than one site minimizes the diagnostic pitfalls.

scholarly journals Assessment of Iodine and Selenium Nutritional Status in Women of Reproductive Age in Latvia

Medicina ◽  
2021 ◽  
Vol 57 (11) ◽  
pp. 1211
Author(s):  
Vija Veisa ◽  
Ieva Kalere ◽  
Tatjana Zake ◽  
Ieva Strele ◽  
Marina Makrecka-Kuka ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Pregnant Women ◽  
Thyroid Function ◽  
Dietary Habits ◽  
Reproductive Age ◽  
Thyroid Peroxidase ◽  
Selenoprotein P ◽  
Urinary Iodine Concentration ◽  
Serum Selenium ◽  
Women Of Reproductive Age

Background and Objectives: Adequate dietary intake of iodine and selenium is essential during pregnancy. While iodine is vital for maternal thyroid function and fetal development, selenium contributes to the regulation of thyroid function and thyroid autoimmunity. This study aimed to assess the consumption of iodine- and selenium-containing products by women of reproductive age and the iodine and selenium nutritional status of pregnant women in Latvia. Materials and Methods: Population health survey (2010–2018) data were used to characterize dietary habits in women of reproductive age. Additionally, 129 pregnant women in the first trimester were recruited; they completed a questionnaire and were tested for thyroid function, urinary iodine concentration (UIC), and serum selenium and selenoprotein P levels. Results: The use of some dietary sources of iodine (e.g., milk and dairy products) and selenium (e.g., bread) has decreased in recent years. Less than 10% of respondents reported the use of iodized salt. The use of supplements has become more common (reported by almost 50% of respondents in 2018). Dietary habits were similar in pregnant women, but the use of supplements was even higher (almost 70%). Nevertheless, most supplements used in pregnancy had insufficient contents of iodine and selenium. Thyroid function was euthyreotic in all women, but 13.9% of participants had a thyroid peroxidase antibodies (TPO-ab) level above 60 IU/mL. The median UIC (IQR) was 147.2 (90.0–248.1) μg/gCr, and 52.8% of pregnant women had a UIC below 150 μg/gCr. The mean selenium (SD) level was 101.5 (35.6) μg/L; 30.1% of women had a selenium level below 80 μg/L. The median selenoprotein P level was 6.9 (3.1–9.0) mg/L. Conclusions: Iodine nutrition in Latvian population of pregnant women was near the lower limit of adequate and a third of the population had a selenium deficiency. Supplements were frequently used, but most did not contain the recommended amounts of iodine and selenium.

scholarly journals Cytomorphological Spectrum of Thyroiditis: A Review of 110 Cases

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Shirish S. Chandanwale ◽  
Rahul Nair ◽  
Anushree Gambhir ◽  
Supreet Kaur ◽  
Aditi Pandey ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Hashimoto’S Thyroiditis ◽  
Thyroid Function Test ◽  
Lymphocytic Infiltration ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Thyroid Follicular Cell ◽  
Cell Clusters ◽  
Thyroid Peroxidase Antibodies ◽  
Function Test

Introduction. Different types of thyroiditis may share some parallel clinical and biochemical features. Timely intervention can significantly reduce morbidity and mortality. Aim. Aim of this study is to find the frequency of various thyroiditis, study the cytomorphological features and correlate with clinical findings including radiological findings, thyroid function test, and anti-thyroid peroxidase antibodies (Anti-TPO antibodies). Materials and Methods. The study included consecutive 110 cases of thyroiditis. Detailed cytomorphological features were studied and correlated with ultrasonography findings, thyroid function test, anti-thyroid peroxidase antibodies (anti-TPO) and histopathological features where thyroidectomy specimens were received for histopathological examination. Results. The majority were Hashimoto’s thyroiditis (n=100) and females (n=103). Other forms of thyroiditis were Hashimoto’s thyroiditis with colloid goiter (n=5), De Quervain’s thyroiditis (n=3), and one case each of postpartum thyroiditis and Hashimoto’s thyroiditis with associated malignancy. The majority of patients were in the age group of 21–40 (n=70) and the majority (n=73) had diffuse enlargement of thyroid. The majority of patients were hypothyroid (n=52). The serum anti-TPO antibodies were elevated in 47 patients out of 71 patients. In the 48 patients who underwent ultrasonography, 38 were diagnosed as having thyroiditis. The most consistent cytomorphological features seen in fine-needle aspiration smears of Hashimoto’s thyroiditis were increased background lymphocytes, lymphocytic infiltration of thyroid follicular cell clusters, and Hurthle cells. Conclusion. The diagnostic cytological features in Hashimoto’s thyroiditis are increased background lymphocytes, lymphocytic infiltration of thyroid follicular cell clusters, and Hurthle cells. FNAC remains the “Gold Standard” for diagnosing Hashimoto’s thyroiditis. Clinical history, thyroid function, and biochemical parameters are the key for diagnosis of other forms of thyroiditis.

scholarly journals Amelioration of iodine supply is notably associated with thyroid function in healthy subjects and in patients with euthyroid Hashimoto’s thyroiditis

2016 ◽  
Vol 85 (10) ◽  
Author(s):  
Nadja Novak ◽  
Ajda Biček ◽  
Katja Zaletel ◽  
Simona Gaberšček
Keyword(s):  
Thyroid Function ◽  
Hashimoto’S Thyroiditis ◽  
Healthy Subjects ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Free Triiodothyronine ◽  
Tertiary Referral Centre ◽  
Salt Iodization ◽  
Iodine Supply ◽  
First Time

Background: Our aim was to establish how healthy subjects (HS) and patients with euthyroid Hashimoto's thyroiditis (EuHT) faced the increase in mandatory salt iodization in Slovenia in 1999 from previous 10 mg of potassium iodide to 25 mg per kg since data about thyroid function with respect to iodine supply are scant.Methods: In this retrospective study we reviewed records of 24,899 patients referred for the first time between 1995 and 2002 to our tertiary referral centre with a stable catchment area for more than 20 years. HS were negative and patients with EuHT positive for thyroid peroxidase antibodies and/or thyroglobulin antibodies. Thyrotropin (TSH), free thyroxine (fT4), and free triiodothyronine (fT3) levels were obtained. The fT4/fT3 ratio was calculated.Results: In the period 1995-1998, 917 HS had significantly lower fT4/fT3 ratio than 644 HS in the period 1999-2002 (2.6±0.6 and 2.9±0.9, respectively, p<0.001) on account of significantly higher fT3 (median 5.7 and 5.2 pmol/L, p<0.001). Similarly, in 1995-1998, 482 patients with EuHT had a lower fT4/fT3 ratio than 846 EuHT in 1999-2002 (2.4±0.6 and 2.8±0.7, respectively, p<0.001) on account of significantly higher fT3 (median 5.8 and 4.9, respectively, p=0.018). HS had a higher fT4/fT3 ratio than patients with EuHT in 1995-1998 but not in 1999-2002 (p<0.001 and p=0.206, respectively).Conclusions: Amelioration of iodine supply is associated with an increase in the fT4/fT3 ratio on account of lower fT3, and with a similar thyroid function in HS and in patients with EuHT.

Impact of the serum thyroglobulin concentration on the diagnostics of benign and malignant thyroid diseases

2000 ◽  
Vol 39 (05) ◽  
pp. 133-138 ◽  
Author(s):  
W. Dembowski ◽  
H.-J. Schroth ◽  
K. Klinger ◽  
Th. Rink
Keyword(s):  
Hashimoto’S Thyroiditis ◽  
Thyroid Volume ◽  
Nodular Goiter ◽  
Thyroid Diseases ◽  
Hashimoto's Thyroiditis ◽  
Graves Disease ◽  
Normal Range ◽  
Serum Thyroglobulin ◽  
Diffuse Goiter ◽  
Hyperthyroid Patients

Summary Aim of this study is to evaluate new and controversially discussed indications for determining the thyroglobulin (Tg) level in different thyroid diseases to support routine diagnostics. Methods: The following groups were included: 250 healthy subjects without goiter, 50 persons with diffuse goiter, 161 patients with multinodular goiter devoid of functional disorder (108 of them underwent surgery, in 17 cases carcinomas were detected), 60 hyperthyroid patients with autonomously functioning nodular goiter, 150 patients with Hashimoto’s thyroiditis and 30 hyperthyroid patients with Graves’ disease. Results: The upper limit of the normal range of the Tg level was calculated as 30 ng Tg/ml. The evaluation of the collective with diffuse goiter showed that the figure of the Tg level can be expected in a similar magnitude as the thyroid volume in milliliters. Nodular tissue led to far higher Tg values then presumed when considering the respective thyroid volume, with a rather high variance. A formula for a rough prediction of the Tg levels in nodular goiters is described. In ten out of 17 cases with thyroid carcinoma, the Tg was lower than estimated with thyroid and nodular volumes, but two patients showed a Tg exceeding 1000 ng/ml. The collective with functional autonomy had a significantly higher average Tg level than a matched euthyroid group being under suppressive levothyroxine substitution. However, due to the high variance of the Tg values, the autonomy could not consistently be predicted with the Tg level in individual cases. The patients with Hashimoto’s thyroiditis showed slightly decreased Tg levels. In Graves’ disease, a significantly higher average Tg level was observed compared with a matched group with diffuse goiter, but 47% of all Tg values were still in the normal range (< 30 ng/ml). Conclusion: Elevated Tg levels indicate a high probability of thyroid diseases, such as malignancy, autonomy or Graves’ disease. However, as low Tg concentrations cannot exclude the respective disorder, a routine Tg determination seems not to be justified in benign thyroid diseases.

Recovery of thyroid function with a decreased titre of antimicrosomal antibody in a hypothyroid man with Hashimoto's thyroiditis

1983 ◽  
Vol 102 (4) ◽  
pp. 531-534 ◽  
Author(s):  
Makiko Yamamoto ◽  
Kazuro Kaise ◽  
Hirofumi Kitaoka ◽  
Katsumi Yoshida ◽  
Nobuko Kaise ◽  
...  
Keyword(s):  
Hashimoto’S Thyroiditis ◽  
Serum Levels ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Normal Range ◽  
Surgical Biopsy ◽  
Low Levels ◽  
Serum Thyroid Hormones ◽  
Antimicrosomal Antibody ◽  
Serum Tsh

Abstract. A 36 year old man with a diffuse goitre, signs of mild hypothyroidism, strikingly low levels of T4 (0.9 μg/dl) and T3 (24 ng/dl), elevated TSH (140 μU/ml) and elevated microsomal haemagglutination antibody (MCHA, 1:409 600), subsequently became non-goitrous and euthyroid with a decreased titre of antimicrosomal antibody without any medication. At the time of surgical biopsy, serum levels of T4 and T3 had risen to the normal range (4.6 μg/dl and 73 ng/dl, respectively), serum TSH had decreased to 30 μU/ml and the titre of MCHA to 1:25 600. Thyroid specimens showed Hashimoto's thyroiditis. The activity of thyroid peroxidase (TPO) was normal. The latest examination, 1 year and 3 months after initial evaluation, showed that the patient remained euthyroid with no goitre, that serum thyroid hormones were within the normal range (T4 7.7 μg/dl and T3 97 ng/dl), and that TSH was not detectable. The titre of MCHA decreased strikingly to 1:400.

scholarly journals Relationship Between Thyroid Hormonal Status in Patients with a Hypothyroid Form of Hashimoto’s Thyroiditis and Iodine Concentrations in Drinking Water

2021 ◽  
Author(s):  
Olha Kasiyan ◽  
Halyna Tkachenko ◽  
Natalia Kurhaluk ◽  
Svitlana Yurchenko ◽  
Alek Manenko
Keyword(s):  
Hashimoto’S Thyroiditis ◽  
Iodine Concentration ◽  
Iodine Intake ◽  
Thyroid Stimulating Hormone ◽  
Hashimoto's Thyroiditis ◽  
Thyroid Peroxidase ◽  
Supply Network ◽  
Thyroid Status ◽  
Thyroglobulin Antibodies ◽  
Regressive Analysis

AbstractThe current study aimed to identify correlative and regressive dependencies between the water iodine concentration and the levels of TSH (thyroid-stimulating hormone), thyroglobulin antibodies (TgAbs), and thyroid peroxidase (TPOAb) in the serum of 168 in patients (34 men and 134 women) with a hypothyroid form of Hashimoto’s thyroiditis who use water from the supply network and individual wells. Based on the water iodine concentration, low and moderate degrees of iodine endemia in the location of the patients were determined. In the groups of men and women using water from different water supply sources, there were direct correlations between the water iodine concentrations and the TgAbs and TPOAb titers as well as an inverse dependence between iodine and TSH levels. Multivariate regressive analysis indicated that TgAb and TSH in the group of women using water from a supply network and TPOAb titers in the group of women using well water were independent factors associated with water iodine concentrations. Statistically significant correlations and regressive dependencies between the water iodine concentrations and the biomarkers of the thyroid status of the patients indicate the risk of Hashimoto’s thyroiditis progression, especially among women with additional iodine intake.

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