Selenium - its role in physiology and endocrinology and as organoselenium compounds in oncology: A minireview.

The present minireview traces the road leading to discovery of selenium, formerly appointed as a toxic element that became later a bioelement, which is necessary for the proper functioning of living organisms. Selenium occurs in human and animal bodies either in the form of seleno-Lcysteine or its dimeric form seleno-L-cystine as a crucial component of selenoenzymes or selenoproteins. Selenium atom represents an integral component of the enzyme active site of different forms of glutathione peroxidase, which catalyzes conversion of hydrogen peroxide and organic hydroperoxides into the water and corresponding alcohols.

Fine-needle biopsy of thyroid nodules and the contribution of molecular analysis of BRAF and RAS mutations.

Background: Thyroid cancer is the most common endocrine malignancy. There is a significant overdiagnosis of thyroid carcinomas that would never clinically manifest, with consequent unnecessary surgical treatment. The fine-needle biopsy and subsequent cytologic examination is of crucial importance in the differential diagnosis of thyroid nodules.

The role of intraoperative frozen section of central neck lymph nodes in the management of patients preoperatively diagnosed with low- risk differentiated cancer.

Introduction: Histological examination during surgery (FS) has a place in the surgical management of differentiated thyroid carcinoma (DTC). Extending the indication for limited surgery to 4 cm tumor size (ATA guidelines 2015) cytologically verified DTCs, increases the emphasis on accurate patient selection. In our work, we reflected on the effectiveness of FS and its relationship to optimal patient management.

Influence of autoimmune thyroiditis on the prognosis of papillary thyroid carcinoma.

Objectives: The association of autoimmune thyroiditis (AIT) with papillary thyroid carcinoma (PTC) has been studied for over 60 years, yet their causal relationship has not been elucidated. Most published papers report a better prognosis of the patients with tumour in the field of thyroiditis. In our work we aimed to find out the differences in the clinical behaviour of PTC depending on the presence of autoimmune inflammation.

[An incidental finding of pheochromocytoma in a 33-year-old patient with Lynch syndrome].

Pheochromocytoma is a catecholamine-producing neuroendocrine tumor arising from chromaffin cells of the adrenal medulla. The detection of these tumors is extremely important because they are associated with high cardiovascular morbidity and mortality. Progress in molecular genetics has revealed that up to 35% of pheochromocytomas are inhereted.

Causal associations of autoimmune thyroiditis and papillary thyroid carcinoma: mRNA expression of selected nuclear receptors and other molecular targets.

Potential causal associations of autoimmune thyroiditis (AIT) and papillary thyroid carcinoma (PTC) have been studied previously. The mRNA expression patterns of thyroid hormone receptors (TR), retinoid receptors (RAR), rexinoid receptors (RXR), dihydroxyvitamin D receptors (VDR), and progesterone receptors (PR) in PTC tissue of patients without autoimmune thyroiditis (PTC/AIT-) and in PTC tissue of patients with coexisting AIT (PTC/AIT+) have been investigated in order to judge whether the observed changes may take part in the promotion and progression of thyroid cancer. Tumours with or without AIT were classified histologically and the semiquantitative PCR was performed.

[The course of differentiated thyroid microcarcinoma in patients treated by different therapeutic strategies].

Low risk differentiated thyroid microcarcinoma therapy is a controversial area of thyroid tumor management. Major international medical societies and reputable institutes consider lobectomy to be sufficient therapeutic intervention for the pT1a cN0cM0 stage of papillary thyroid microcarcinoma. However different views and therapeutic strategies exist and result in unnecessary overtreatment and worsening of patients quality of life.

Current status of iodine deficiency-related disorders prophylaxis in Slovakia - the life's work of Julian Podoba remained unfinished.

Objective: Prophylaxis of iodine deficiency-related disorders with iodized salt in Slovakia was introduced in 1951. This prophylactic measure yielded remarkably good results. Endemic goiter and endemic cretinism disappeared.

Ensuring Effective Prevention of Iodine Deficiency Disorders.

Background: Programs initiated to prevent iodine deficiency disorders (IDD) may not remain effective due to changes in government policies, commercial factors, and human behavior that may affect the efficacy of IDD prevention programs in unpredictable directions. Monitoring and outcome studies are needed to optimize the effectiveness of IDD prevention.

Summary: Although the need for monitoring is compelling, the current reality in Europe is less than optimal.

mRNA expression pattern of retinoic acid and retinoid X nuclear receptor subtypes in human thyroid papillary carcinoma.

Retinoids have shown potential for the inhibition of tumour growth and progression. The objective of this study was to investigate retinoic acid nuclear receptor subtypes RAR/RXR and iodothyronine 5'-deiodinase, type I expression pattern in papillary thyroid tumour tissue of 26 patients in order to compare with those of the non-neoplastic thyroid tissue of the corresponding patients. The expression of selected parameters mRNA was examined by semi-quantitative RT-PCR.

Recombinant human thyrotropin in follow-up of patients with differentiated thyroid cancer.

Background: Despite very good prognosis patients with previously treated well-differentiated thyroid cancer (DTC) require lifelong monitoring for recurrent disease. Apart from neck ultrasonography (USG) two diagnostic tests play a central role in follow-up of these patients: radioiodine whole body scanning and serum thyroglobulin (Tg) measurement. The diagnostic value of both tests is most accurate during thyroid stimulating hormone (TSH) stimulation.

Effect of growth hormone replacement therapy on plasma brain natriuretic peptide concentration, cardiac morphology and function in adults with growth hormone deficiency.

Objective: The impact of growth hormone (GH) replacement on plasma brain natriuretic peptide (BNP) in association with cardiac morphology and function in adults with growth hormone deficiency (GHD) was evaluated.

Subjects And Methods: Fifty nine adult patients with GHD (29 men, age 19-59 years) received a starting dose of 0.1-0.

Accuracy of recall in quality-of-life assessment among women operated on for stress urinary incontinence.

Introduction And Hypothesis: The purpose of this study is to assess the validity and reliability of a retrospective quality-of-life (QOL) assessment.

Methods: The Incontinence Impact Questionnaire (IIQ-30) and the Short-Form Health Survey (SF-12) were self-administered pre-operatively. At 3 months post-op, the IIQ-30 and SF-12 surveys were mailed to patients to reassess their pre-operative QOL status.

Prophylaxis against respiratory syncytial virus in young children with cystic fibrosis.

Introduction: In cystic fibrosis (CF) patients, respiratory syncytial virus (RSV) infection is associated with significant morbidity. Although passive prophylaxis with palivizumab lowers hospitalization rate for RSV infection in populations at risk of severe infection, its use is not recommended in infants with CF disease.

Objective: To determine the effect of palivizumab prophylaxis on hospitalization for acute respiratory illness in young children with CF during the first RSV season following the diagnosis of CF.

A prospective, multicentre study to investigate the efficacy, safety and tolerability of octreotide LAR (long-acting repeatable octreotide) in the primary therapy of patients with acromegaly.

Objective: To evaluate the efficacy, safety and tolerability of octreotide LAR (long-acting repeatable octreotide) in the primary therapy of acromegaly.

Design And Patients: Ninety-eight previously untreated acromegalics were recruited into this prospective multicentre study. A total of 68 patients successfully completed 48 weeks of the study period, received 12 doses of octreotide LAR 10-30 mg every 4 weeks, and constituted the population used for this analysis.

[The cooperation between the ophthalmologist and the endocrinologist in the treatment of the endocrine orbitopathy].

Authors of this study emphasize the requirement of the cooperation between the ophthalmologist and the endocrinologist in diagnostics and treatment of moderate and severe forms of endocrine orbitopathy (EO). Examinations necessary for diagnosis and possibilities of the systemic treatment are reported. Twenty patients within the group of 70 patients with EO, who had severe form of disease and underwent different combinations of corticosteroid therapy, immunosuppressive therapy, radiotherapy (RA) and orbital decompression were followed up.

[Epidemiology of the endocrine orbitopathy].

The goal of this paper was to evaluate epidemiological data of the endocrine orbitopathy in a group of 126 patients (250 eyes) during the 5-years period (1999-2004). The prevalence of endocrine orbitopathy was at the age 46.5 +/- 11.

Association of unmet need with self-rated health in a community dwelling cohort of disabled seniors 75 years of age and over.

Self-rated health (SRH) is a measure of perceived health that has been shown to predict use of community services, functional decline, pain, and mortality. Many factors associated with SRH have been identified, but unmet need for physical assistance with activities of daily living (ADL) has not yet been examined. The objective of this paper is to examine the association between unmet need and SRH while accounting for the effects of other, previously identified, correlates of SRH.

Iodized oil as a complement to iodized salt in schoolchildren in endemic goiter in Romania.

Objective: To evaluate the long-term efficacy and possible side effects of low doses of iodized oil on iodine nutrition and thyroid function in endemic goiter in Romania.

Methods: Random selection of 214 schoolchildren aged 6-14 years. Serial measurements of urinary iodine, thyroid volume with ultrasound, serum concentrations of thyrotropin, free thyroxine, thyroglobulin and thyroid autoantibodies before and up to 2 years after the oral administration of 200 mg iodine in iodized oil.

Thyroid hormone receptors and type I iodothyronine 5'-deiodinase activity of human thyroid toxic adenomas and benign cold nodules.

The majority of thyroid adenomas are of clonal origin. In a subset of toxic adenomas (TAs) and cold nodules (CNs) activating mutations in the thyrotropin (TSH) receptor or G s -alpha gene may explain the altered functions in these benign tumours. The present study was undertaken to investigate the status of functional thyroid hormone receptors, major thyroid hormone signal mediators, in both the human TAs and CNs in comparison with a normal thyroid tissue from the same patient.

Environmental risk factors for delirium in hospitalized older people.

Objectives: To evaluate the relationship of environmental risk factors in hospitals to changes over time in delirium symptom severity scores.

Design: Observational prospective clinical study with repeated measurements, several times during the first week of hospitalization and then weekly during hospitalization.

Setting: University-affiliated general community hospital.

A survey of iodine intake and thyroid volume in Dutch schoolchildren: reference values in an iodine-sufficient area and the effect of puberty.

Background: Iodine deficiency and endemic goiter have been reported in the past in The Netherlands, especially in the southeast.

Objective: To evaluate iodine intake and thyroid size in Dutch schoolchildren, contrasting those living in a formerly iodine-deficient region in the east (Doetinchem) with those living in an iodine-sufficient region in the west (Amsterdam area).

Design: Cross-sectional survey of 937 Dutch schoolchildren aged 6--18 years, of whom 390 lived in the eastern and 547 in the western part of the country.

A programme of iodine supplementation using only iodised household salt is efficient--the case of Poland.

Background: Iodine prophylaxis in Poland started in 1935 and has been interrupted twice: by World War II and in 1980 for economic reasons. Epidemiological surveys carried out after the Chernobyl accident in 1989 as well as in 1992/1993 and in 1994 as a 'ThyroMobil' study, revealed increased prevalence of goitre in children and adults. Ninety per cent of Poland was classified as an area of moderate iodine deficiency, and 10%, in the seaside area, as mild iodine deficiency territory.

Toward a consensus on reference values for thyroid volume in iodine-replete schoolchildren: results of a workshop on inter-observer and inter-equipment variation in sonographic measurement of thyroid volume.

Objective: Interpretation of thyroid ultrasonography for assessing goiter prevalence requires valid reference criteria from iodine-sufficient populations. Reports have suggested the current reference criteria for thyroid volume (T(vol)) of WHO/ICCIDD (International Council for the Control of Iodine Deficiency Disorders) may be too high. Our objective was to determine if inter-observer and/or inter-equipment variability contributes to the disagreement in sonographic T(vol) in children reported from iodine-sufficient areas.