Seasonality of month of birth in patients with autoimmune endocrine diseases: A systematic review.

BACKGROUND: Exposure to seasonal environmental factors during gestation or early in the postnatal period could influence the development of autoimmunity, determining a seasonality in the month of birth (MOB). There are studies evaluating this potential seasonality in patients with type 1 diabetes (T1D), autoimmune thyroid diseases (AITD), and Addison's disease (ADD), but results have been controversial. METHODS: Systematic review according to PRISMA guidelines, using PubMed, Web of Science and WorldCat databases (2005-2020) of studies that explored the association between the seasonality of the MOB and T1D, AITD and ADD. Information on sex and age, location, methodology and internal quality, seasonal patterns, hypotheses and other factors proposed to explain seasonality were extracted. Differences in season and month of birth were further discussed. RESULTS: The initial search retrieved 300 articles, and after further screening, 11 articles fulfilled inclusion criteria and were finally selected and reviewed. 73% found a seasonal pattern and 64% showed birth peaks in spring and/or summer. Hashimoto's thyroiditis and women exhibited a higher seasonality. Ultraviolet radiation, Vitamin D levels and viral infections were identified as influencing factors. CONCLUSIONS: The effect of certain seasonal factors during foetal development, reflected by the seasonal differences in the MOB, could contribute to the development of endocrine autoimmune diseases in predisposed patients. Further research is needed to elucidate the mechanisms underlying the observed seasonality.

Prevalencia de enfermedades autoinmunes en pacientes con diabetes mellitus tipo 1. Estudio DIACAM 1 2010-2020 / Prevalence of autoimmune diseases in patients with type 1 diabetes mellitus. DIACAM 1 study 2010-2020

Objective: To evaluate the prevalence of autoimmune diseases (AD) associated with type 1 diabetes mellitus (T1DM).Patients and methodsAnalytical cross-sectional study, nested in a multicenter prospective cohort of 1121 adults with DM1 with active follow-up in endocrinology clinics. Sociodemographic and clinical variables and the presence of AD were analysed in 2010 and 2020.ResultsIn this second analysis, 49,5% were male, mean age was 49.4 ± 12.8 years, median T1DM duration was 27,1 years (20,7-35,1) and mean glycated hemoglobin was 7.66 ± 1.06%. There is an absolute increase of 13% (95% CI 11-15) (p < 0.001) of patients with at least one AE and an absolute increase of 11.6% (95% CI 9.7-13.5) (p < 0.0001) of any type of autoimmune thyroid disease (ATD) after 10 years of follow-up. Likewise, the prevalence of celiac disease, autoimmune gastritis and other AD increased statistically significantly. In the multivariate logistic regression analysis, the factors that were independently associated with the presence of ATD were female gender [OR 2.9 (95% CI 2.3-3.7); p < 0.0001] and the presence of type 1 b diabetes (OR 0.5 [95% CI 0.3-0.9]; p = 0.041).ConclusionsAfter 10 years of follow-up, there is a substantial increase in other types of AE in patients with DM1. It seems necessary to carry out a systematic screening of these AD to optimize the follow-up of patients with 1 TDM, mainly of the ATD. (AU)

Objetivo: Conocer la prevalencia de las enfermedades autoinmunes (EA) asociadas a la diabetes mellitus tipo 1 (DM1).Pacientes y métodosEstudio transversal analítico, anidado en una cohorte prospectiva multicéntrica de 1.121 adultos con DM1 con seguimiento activo en consultas de endocrinología. Se analizaron variables sociodemográficas, clínicas y la presencia de EA en el año 2010 y en el año 2020.ResultadosEn este segundo análisis, la edad media fue de 49,4 ± 12,8 años, siendo el 49,5% varones, con una mediana de tiempo de evolución de la DM1 de 27,1 años (20,7-35,1) y una media de hemoglobina glicosilada de 7,66 ± 1,06%. Existe un incremento absoluto del 13% (IC 95% 11-15) (p < 0,001) de pacientes con al menos una EA y un incremento absoluto de 11,6% (IC 95% 9,7-13,5) (p < 0,0001) de cualquier tipo de enfermedad tiroidea autoinmune (ETA) tras 10 años de seguimiento. Así mismo, aumentó la prevalencia de manera estadísticamente significativa de la gastritis autoinmune, enfermedad celiaca y otras EA. En el análisis de regresión logística multivariante, los factores que se asociaron de manera independiente a la presencia de ETA fueron el género femenino (OR 2,9 [IC 95% 2,3-3,7]; p < 0,0001) y la DM1 tipo b (OR 0,5 [IC 95% 0,3-0,9]; p = 0,041).ConclusionesTras 10 años de seguimiento activo se produce un incremento sustancial de otro tipo de EA en pacientes con DM1. Parece necesario realizar un cribado sistemático de dichas EA para optimizar el seguimiento de los pacientes con DM1, fundamentalmente de la ETA. (AU)

Deficiencia de IgA y comorbilidades autoinmunes en la artritis idiopática juvenil / IgA deficiency and autoimmune comorbidities in juvenile idiopathic arthritis

Objetivos: 1) Describir la prevalencia de deficiencia de IgA (DIgA), uveítis, enfermedad celiaca (EC) y alteraciones tiroideas en una cohorte multicéntrica de pacientes diagnosticados de artritis idiopática juvenil (AIJ), y 2) evaluar si los pacientes con AIJ y DIgA presentan otras enfermedades autoinmunes con más frecuencia que los pacientes con niveles normales de IgA. Métodos: Estudio retrospectivo de una cohorte de pacientes con AIJ en seguimiento en unidades de Reumatología pediátrica en 2 hospitales de Madrid (España). Resultados: Se incluyó a 193 pacientes, de los cuales 123 eran mujeres (64%). La edad media al inicio fue 5,6 años (RIC 2,5-9,7) y la mediana de seguimiento 5,1 años (RIC 2,2-8,1). Las 3 categorías ILAR más frecuentes fueron oligoarticular (53%), poliarticular con factor reumatoide negativo (20%) y artritis relacionada con entesitis (10%). Los niveles séricos de IgA estaban disponibles en 172/193 (89%); 25/172 (15%) tenían DIgA, selectiva (< 7mg/dl, n=8) o parcial (7-69mg/dl, n=17). Todos los pacientes tuvieron revisiones oftalmológicas periódicas. Tuvieron uveítis anterior 18 pacientes (9%), 15/18 crónica y 3/18 aguda. Los niveles séricos de antitransglutaminasa IgA (o IgG en pacientes con DIgA) fueron obtenidos en 135/193 (70%); 4 pacientes (3%) fueron diagnosticados de EC por biopsia (n=3) o por criterios clínicos, serológicos o genéticos (n=1); 2 de ellos tenían DIgA (p=0,12; OR=6,4; IC del 95%, 0,9-47,6). Solo 1/153 (0,7%) tuvo hipertirotropinemia con anticuerpos antitiroideos positivos y requirió tratamiento. Conclusión: Los pacientes con AIJ presentan comorbilidades autoinmunes con frecuencia. La DIgA no parece aumentar su prevalencia, con la posible excepción de la EC. (AU)

Objectives: (1) To describe the prevalence of IgA deficiency (IgAD), uveitis, coeliac disease (CD) and thyroid disorders in a multicentre cohort of patients with juvenile idiopathic arthritis (JIA), and (2) to assess whether patients with JIA and IgAD have additional autoimmune disorders more frequently than patients with JIA and normal serum levels of IgA. Methods: Retrospective chart review of a cohort of patients with JIA managed in the paediatric rheumatology units of 2hospitals in Madrid, Spain. Results: This study included 193 patients, 123 (64%) female. The median age at disease onset was 5.6 years (IQR 2.5–9.7) and the median duration of followup was 5.1 years (IQR 2.2–8.1). The 3most common categories of JIA based on the ILAR classification were oligoarticular (53%), poliartritis RF-negative (20%) and enthesitis-related arthritis (10%). Serum IgA levels were available in 172/193 (89%); 25/172 (15%) had selective (<7mg/dl, n=8) or partial (7-69mg/dl, n=17) IgAD. All patients underwent periodic ophthalmic examinations. Eighteen children (9%) had anterior uveitis, which was chronic in 15 and acute in 3. Serum levels of anti-transglutaminase IgA, or IgG in IgAD were obtained in 135/193 (70%). Four children (3%) were diagnosed with CD either by intestinal biopsy (n=3) or by the combination of characteristic clinical, serological and genetic features (n=1); 2of them had IgAD (OR=6.4; 95% CI, 0.9–47.6; p=.12). Only 1 of these 153 patients (0.7%) had hyperthyrotropinaemia with positive anti-thyroid antibodies and required replacement therapy. Conclusion: Patients with JIA frequently present autoimmune comorbidities. IgAD does not seem to increase their prevalence, with the possible exception of CD. (AU)

IgA deficiency and autoimmune comorbidities in Juvenile Idiopathic Arthritis.

OBJECTIVES: (1) To describe the prevalence of IgA deficiency (IgAD), uveitis, coeliac disease (CD) and thyroid disorders in a multicentric cohort of patients diagnosed with JIA and, (2) to evaluate whether patients with JIA and IgAD present other autoimmune diseases more frequently than patients with normal serum levels of IgA. METHODS: Retrospective chart review of a cohort of patients diagnosed with JIA followed at the paediatric rheumatology units of two hospitals in Madrid, Spain. RESULTS: A total of 193 patients were included. Of them, 123 were females (64%). Median age at disease onset was 5.6 years (IQR 2.5-9.7) and the median time of follow-up was 5.1 years (IQR 2.2-8.1). The three most common ILAR categories were oligoarticular (53%), polyarticular RF negative (20%) and enthesitis related arthritis (10%). Serum IgA levels were available in 172/193 (89%); 25/172 (15%) had selective (<7mg/dl, n=8) or partial (7-69mg/dl, n=17) IgAD. All the patients had periodic eye exams. Eighteen children (9%) had anterior uveitis, 15/18 chronic and 3/18 acute. Serum anti transglutaminase IgA, or IgG in IgAD were obtained in 135/193 (70%). Four children (3%) were diagnosed with CD either by intestinal biopsy (n=3) or by the combination of characteristic clinical, serological and genetic features (n=1); two of them had IgAD (p=0.12; OR=6.4; 95% CI 0.9-47.6). Only 1/153 (0.7%) patient had hyperthyrotropinemia with positive anti-thyroid antibodies and required replacement therapy. CONCLUSION: Patients with JIA frequently present autoimmune comorbidities. IgAD does not seem to increase their prevalence, with the possible exception of CD.

Prevalence of autoimmune diseases in patients with type 1 diabetes mellitus. DIACAM 1 study 2010-2020. / Prevalencia de enfermedades autoinmunes en pacientes con diabetes mellitus tipo 1. Estudio DIACAM 1 2010-2020.

OBJECTIVE: To evaluate the prevalence of autoimmune diseases (AD) associated with type 1 diabetes mellitus (T1DM). PATIENTS AND METHODS: Analytical cross-sectional study, nested in a multicenter prospective cohort of 1121 adults with DM1 with active follow-up in endocrinology clinics. Sociodemographic and clinical variables and the presence of AD were analysed in 2010 and 2020. RESULTS: In this second analysis, 49,5% were male, mean age was 49.4 ± 12.8 years, median T1DM duration was 27,1 years (20,7-35,1) and mean glycated hemoglobin was 7.66 ± 1.06%. There is an absolute increase of 13% (95% CI 11-15) (p < 0.001) of patients with at least one AE and an absolute increase of 11.6% (95% CI 9.7-13.5) (p < 0.0001) of any type of autoimmune thyroid disease (ATD) after 10 years of follow-up. Likewise, the prevalence of celiac disease, autoimmune gastritis and other AD increased statistically significantly. In the multivariate logistic regression analysis, the factors that were independently associated with the presence of ATD were female gender [OR 2.9 (95% CI 2.3-3.7); p < 0.0001] and the presence of type 1 b diabetes (OR 0.5 [95% CI 0.3-0.9]; p = 0.041). CONCLUSIONS: After 10 years of follow-up, there is a substantial increase in other types of AE in patients with DM1. It seems necessary to carry out a systematic screening of these AD to optimize the follow-up of patients with 1 TDM, mainly of the ATD.

Disfunción tiroidea y diabetes mellitus tipo 1 / Thyroid dysfunction and type 1 diabetes mellitus

Introducción: La diabetes mellitus tipo 1 es una enfermedad autoinmunitaria que se relaciona con alteraciones tiroideas. Objetivo: Describir la relación que existe entre diabetes mellitus tipo 1 y enfermedad tiroidea autoinmune. Métodos: Se realizó una revisión de la literatura nacional e internacional de los últimos 15 años en bases de datos, en español y en inglés. Se utilizaron las siguientes palabras clave: diabetes mellitus tipo 1, autoinmunidad, enfermad tiroidea autoinmune, disfunción tiroidea y anticuerpos antitiroideos. Análisis e integración de la información: La alteración más frecuente es el hipotiroidismo subclínico y se presenta con mayor frecuencia en el sexo femenino, por lo que se sugiere realizar periódicamente el perfil tiroideo a estos pacientes. Conclusiones: Se debe tener en cuenta en la práctica clínica estas implicaciones para brindar un tratamiento oportuno, mejorar complicaciones derivadas como las enfermedades cardiovasculares y disminuir las cifras de morbilidad y mortalidad(AU)

Introduction: Type 1 diabetes mellitus is an autoimmune disease that is related to thyroid abnormalities. Objective: Describe the relationship between type 1 diabetes mellitus and autoimmune thyroid disease. Methods: A review of the national and international literature of the last 15 years was carried out in databases, in Spanish and in English. The following keywords were used: type 1 diabetes mellitus, autoimmune, autoimmune thyroid disease, thyroid dysfunction and antithyroid antibodies. Analysis and integration of information: The most common alteration is subclinical hypothyroidism and it occurs most often in the female sex, so it is suggested to periodically perform the thyroid profile to these patients. Conclusions: These implications should be taken into account in clinical practice to provide timely treatment, improve complications such as cardiovascular disease and reduce morbidity and mortality figures(AU)

Family history of thyroid disease and risk of congenital hypothyroidism in neonates with Down síndrome.

INTRODUCTION: Family history of thyroid disease (FHTD) constitutes a possible risk factor for congenital hypothyroidism (CH) in the general population; however, FHTD possible relationship with CH in subjects with Down syndrome (DS) has not yet been explored. OBJECTIVE: To determine whether FHTD is associated with an increased incidence of CH in neonates with DS. METHOD: Hospital-based case-control study in 220 neonates with DS. Thyroid function tests of 37 infants with DS and positive FHTD (cases) were compared with those of 183 newborns with DS without FHTD (control group). Data were analyzed using multivariate logistic regression analysis and adjusted odds ratios (aORs) with their respective 95 % confidence intervals (CI) were calculated. RESULTS: Nine newborns with DS in our sample had CH (4.1 %). In the multivariate analysis, FHTD showed an association with CH in neonates with DS (aOR = 8.3, 95 % CI: 2.0-34.3), particularly in males (aOR = 9.0, 95 % CI: 1.6-49.6). In contrast, newborns with DS without FHTD were less likely to suffer from CH (aOR = 0.4, 95 % CI: 0.1-0.8). CONCLUSIONS: Newborns with DS and FHTD have an eight-fold higher risk for CH, particularly when the index case is male. FHTD detailed evaluation can be an easy and accessible strategy to identify those newborns with DS at higher risk for CH.

INTRODUCCIÓN: La historia familiar de enfermedad tiroidea (HFET) como factor de riesgo para hipotiroidismo congénito (HC), en síndrome de Down (SD) aún no ha sido explorada. OBJETIVO: Determinar si la HFET está asociada a mayor riesgo de HC en neonatos con SD. MÉTODO: Estudio de casos y controles en 220 neonatos con SD. Se compararon las pruebas de función tiroidea (PFT) de 37 con SD e HFET (casos), frente a las PFT de 183 recién nacidos con SD sin HFET (grupo de referencia). Se realizó análisis de regresión logística multivariante y se calculó la razón de momios (RM) y sus respectivos intervalos de confianza del 95 % (IC 95 %). RESULTADOS: Nueve casos HC (4.1 %). El HC mostró asociación con la HFET (RMa = 8.3, IC 95 %: 2.0-34.3), particularmente en los varones (RMa = 9.0, IC 95 %: 1.6-49.6). La ausencia de HFET tuvo una RM de protección para HC (RMa = 0.4, IC 95 %: 0.1-0.8). CONCLUSIONES: La HFET puede es una estrategia fácil y accesible para identificar pacientes con SD con mayor riesgo de HC.

Historia familiar de enfermedad tiroidea y riesgo de hipotiroidismo congénito en neonatos con síndrome de Down / Family history of thyroid disease and risk of congenital hypothyroidism in neonates with Down syndrome

Resumen Introducción: La historia familiar de enfermedad tiroidea (HFET) como factor de riesgo para hipotiroidismo congénito (HC), en síndrome de Down (SD) aún no ha sido explorada. Objetivo: Determinar si la HFET está asociada a mayor riesgo de HC en neonatos con SD. Método: Estudio de casos y controles en 220 neonatos con SD. Se compararon las pruebas de función tiroidea (PFT) de 37 con SD e HFET (casos), frente a las PFT de 183 recién nacidos con SD sin HFET (grupo de referencia). Se realizó análisis de regresión logística multivariante y se calculó la razón de momios (RM) y sus respectivos intervalos de confianza del 95 % (IC 95 %). Resultados: Nueve casos HC (4.1 %). El HC mostró asociación con la HFET (RMa = 8.3, IC 95 %: 2.0-34.3), particularmente en los varones (RMa = 9.0, IC 95 %: 1.6-49.6). La ausencia de HFET tuvo una RM de protección para HC (RMa = 0.4, IC 95 %: 0.1-0.8). Conclusiones: La HFET puede es una estrategia fácil y accesible para identificar pacientes con SD con mayor riesgo de HC.

Abstract Introduction: Family history of thyroid disease (FHTD) as risk factor for congenital hypothyroidism (CH) in patients with Down syndrome (DS) has not yet been explored. Objective: To determine whether FHTD is associated with an increased risk for CH in DS. Method: Case-control study in 220 neonates with DS. Thyroid function tests of 37 infants with DS and FHTD (cases) were compared with those of 183 DS newborns without FHTD (reference group). Data were analyzed using multivariate logistic regression analysis and adjusted odds ratios (aORs) with their respective 95 % confidence intervals (CI) were calculated. Results: Nine newborns with DS in our sample had CH (4.1 %). FHTD showed an association with CH in neonates with DS (aOR = 8.3, 95 % CI: 2.0-34.3), particularly in males (aOR = 9.0, 95 % CI: 1.6-49.6). In contrast, newborns with DS without FHTD were less likely to suffer from CH (aOR = 0.4, 95 % CI: 0.1-0.8). Conclusions: FHTD detailed evaluation can be an easy and accessible strategy to identify those newborns with DS at higher risk for CH.

Interpretación de las pruebas de función tiroidea / Interpretation of thyroid function tests

Los desórdenes de la glándula tiroides son comunes y pueden afectar hasta el 10% de la población en general. En muchas ocasiones los síntomas pueden ser inespecíficos, por lo que el médico en busca de un trastorno tiroideo debe llegar a un diagnóstico funcional y anatómico. Las mediciones séricas de las hormonas tiroideas confirman si hay un exceso, un déficit o si las concentraciones son normales. Para ello, se requiere un rango de referencia de la población local, y específicamente por grupos de edad, para una correcta interpretación de las pruebas de función tiroidea. Las hormonas tiroideas juegan un papel fundamental en el sistema endocrino, controlan el metabolismo general del cuerpo, el desarrollo neural, el crecimiento normal y la maduración de los huesos, así como funciones cardiovasculares y renales, entre otras. En esta revisión se pretende dar una aproximación a las pruebas tiroideas más relevantes, partiendo de la biosíntesis y secreción de las hormonas tiroideas, hasta llegar al abordaje para un diagnóstico inicial del paciente con trastorno tiroideo, mencionando los aspectos más importantes de los diferentes patrones tiroideos. El tratamiento detallado de cada uno de ellos, supera las expectativas de esta revisión

Thyroid gland disorders are common and can affect up to 10% of the general population. In many cases the symptoms can be nonspecific, so the physician in search for a thyroid disorder should reach a functional and anatomical diagnosis. Serum measurements of thyroid hormones confirm if there is an excess, a deficit, or if concentrations are normal. For this, reference ranges of the local population, and specifically by age groups, are required for a correct interpretation of thyroid function tests. Thyroid hormones play a fundamental role in the endocrine system, control of the general metabolism of the body, neural development, normal growth and maturation of bones, as well as in cardiovascular and renal functions, among others. In this review, the most relevant thyroid tests will be described, starting with the biosynthesis and secretion of thyroid hormones, and continuing with an approach to reach an initial diagnosis. Finally, the most important aspects of the different thyroid patterns will be mentioned. It is beyond the scope of this review, to describe the treatment for thyroid disorders.

Hipotiroidismo asociado con infertilidad en mujeres en edad reproductiva / Hypothyroidism associated with infertility in women in reproductive age

Resumen: OBJETIVO: Revisar la bibliografía más reciente para valorar y sintetizar los aspectos más importantes relacionados con las repercusiones del hipotiroidismo y su asociación con infertilidad en la mujer en edad reproductiva. METODOLOGÍA: Estudio de investigación documental consistente en la búsqueda en las bases electrónicas de PubMed y Google Scholar (1993-2018) con las palabras clave: hipotiroidismo subclínico, hipotiroidismo, disfunción tiroidea, hipofunción tiroidea, enfermedad de tiroides subclínica, pérdida de embarazo, aborto y embarazo; escritos en español e inglés y estudios retrospectivos publicados en libros de texto. RESULTADOS: Se incluyeron 39 documentos y se seleccionaron los de mayor relevancia científica y epidemiológica. El hipotiroidismo afecta a las mujeres en edad reproductiva con prevalencia de 0.4-0.5% para el evidente y 2-8% para el subclínico, este último puede resultar en infertilidad femenina y pobres desenlaces reproductivos. CONCLUSIÓN: El hipotiroidismo es una enfermedad que afecta más a las mujeres que a los hombres, con mayor incidencia en la etapa fértil. El diagnóstico y tratamiento oportuno mejoran el pronóstico de la fertilidad, embarazo y vida del recién nacido.

Abstract: OBJECTIVE: To review the most recent bibliography to assess and synthesize the most important aspects in relation to the repercussions of hypothyroidism and its association with infertility in women of reproductive age. METHODOLOGY: Documentary research study carried out based on the search in PubMed and Google Scholar; from the years 1993 to 2018 with the keywords: subclinical hypothyroidism, hypothyroidism, thyroid dysfunction, thyroid hypofunction, subclinical thyroid disease, pregnancy loss, abortion and pregnancy in Spanish and English and retrospective study in textbooks. RESULTS: 39 documents were included, selecting the ones with the highest scientific and epidemiological relevance. Hypothyroidism affects women of reproductive age with a prevalence of 0.4-0.5% for the obvious and 2-8% for the subclinical, the latter can result in female infertility and poor reproductive results. CONCLUSION: Hypothyroidism is a pathology that affects women, with a higher incidence in the fertile stage. A timely diagnosis and treatment improve the prognosis of fertility, pregnancy and life of the newborn.

Optimization of the follow-up of pregnant women with autoimmune thyroid disease. / Optimización del seguimiento de gestantes con enfermedad tiroidea autoinmune.

OBJECTIVE: To determine the risk of hypothyroidism in pregnant women with autoimmune thyroid disease and thyrotropin (TSH) < 2,5 mIU/l at the beginning of pregnancy. METHODS: Prospective longitudinal study of pregnant women with no personal history of thyroid disease, and with TSH < 2.5 mIU/l in the first trimester. TSH, free thyroxine (FT4), anti peroxidase (TPO) and anti thyroglobulin antibodies were measured in the 3 trimesters of pregnancy. We compared thyroid function throughout pregnancy, and the development of gestational hypothyroidism (TSH >4 mIU/l) among pregnant women with positive thyroid autoimmunity and those with negative autoimmunity. RESULTS: We included 300 pregnant women with mean baseline TSH 1.3 ± 0.6 mIU/l (9th gestational week). Positive thyroid autoinmunity was detected in 17.7% of women (n = 53) at the first trimester. Between the first and the third trimesters, TPO and anti thyroglobulin antibodies titers decreased 76.8% and 80.7% respectively. Thyroid function during pregnancy was similar among the group with positive autoimmunity and the group with negative autoimmunity, and the development of hypothyroidism was 1.9% (1/53) and 2% (5/247) respectively. Pregnant women in whom TSH increased above 4 mIU/l (n = 6), had higher baseline TSH levels compared to those who maintained TSH ≤4 mIU/l during pregnancy (1.8 vs. 1.3 mIU/l; p=.047). CONCLUSION: In our population, women with TSH levels <2.5 mIU/l at the beginning of pregnancy have a minimal risk of developing gestational hypothyroidism regardless of thyroid autoimmunity.

Adaptation and cross-cultural validation of the Spanish version of the Thyroid-Related Quality-of-Life Patient-Reported Outcome questionnaire.

INTRODUCTION: The ThyPRO questionnaire is the most widely used tool for measuring quality of life in patients with benign thyroid diseases. The purpose of this study was to adapt and validate a Spanish translation of the ThyPRO and its abbreviated version (ThyPRO-39). MATERIAL AND METHODS: Adaptation to the Spanish language was performed using the forward-backward translation method, followed by a pretesting study on five representative patients. The final questionnaire (ThyPROes) was administered to 155 patients with thyroid disorders recruited in a tertiary Spanish hospital. Psychometric properties were evaluated by multitrait scaling and estimation of internal consistency reliability (Cronbach's alpha coefficient). Data from a previous sample of 902 Danish patients were used to analyze differential item functioning (DIF) between the Spanish and the original Danish versions of the questionnaire using ordinal logistic regression. RESULTS: Three of 85 items in ThyPROes and four of the 39 items in ThyPRO-39es lacked convergent validity, while lack of discriminant validity was found for in nine and 14 items of each version respectively. Cronbach's alpha was >0.7 for 12 of 13 scales in the ThyPRO and 10 of 12 scales in the ThyPRO-39es. Eight items in the ThyPROes were flagged with DIF (one with non-uniform DIF), as were two items in the ThyPRO-39es. DIF magnitude was small (explained variance in the item score <3%) in most cases, with a minor impact on scale scores. CONCLUSIONS: The Spanish versions of the ThyPRO and ThyPRO-39 show acceptable psychometric properties and good cross-lingual validity, and are suitable for use in clinical studies.

Síndrome poliglandular autoinmunitario tipo II (síndrome de Schmidt): enfermedad de Addison y tiroiditis de Hashimoto asociado con vitíligo / Polyglandular autoimmune syndrome type II (Schmidt syndrome): Addison's disease and Hashimoto's thyroiditis associated to vitiligo

Resumen Los síndromes poliglandulares autoinmunitarios son afecciones poco frecuentes que se distinguen por la coexistencia de al menos dos enfermedades glandulares autoinmunitarias. Se clasifican en tipo I (o juvenil) y tipos II y III (o del adulto). El tipo II o síndrome de Schmidt se caracteriza por enfermedad de Addison, enfermedad tiroidea autoinmunitaria o diabetes mellitus tipo 1 que pueden vincularse con otras alteraciones de naturaleza autoinmunitaria, como vitíli go, hepatitis autoinmunitaria, miastenia gravis, anemia perniciosa, enfermedad celiaca y alopecia areata, entre otras. Se comunica el caso de una paciente de 61 años de edad con vitíligo a quien se le diagnosticó enfermedad de Addison y tiroiditis de Hashimoto (síndrome de Schmidt).

Abstract Autoimmune polyglandular syndromes are rare conditions characterized by the coexistence of at least two autoimmune glandular diseases. They can be classified in type I (or juvenile) and type II and III (or adult). Type 2 or Schmidt's syndrome is characterized by Addison's disease, autoimmune thyroid disease and/or type 1 diabetes mellitus and may be associated with other disorders of autoimmune nature, such as vitiligo, autoimmune hepatitis, myasthenia gravis, pernicious anemia, celiac disease or alopecia areata, among others. We communicate the case of a 61 year-old woman with vitiligo diagnosed with Addison's disease and Hashimoto's thyroiditis (Schmidt's syndrome).

Prevalencia de autoinmunidad tiroidea en mujeres subfértiles / Prevalence of thyroid autoimmunity in subfertile women

Resumen OBJETIVO: estimar la prevalencia de enfermedad tiroidea autoinmunitaria en pacientes subfértiles y saber si existe asociación entre enfermedad tiroidea autoinmunitaria aislada en mujeres eutiroideas y los resultados en técnicas de reproducción asistida. MATERIALES Y MÉTODOS: estudio observacional, transversal, ambispectivo, que evaluó mujeres de 18 a 43 años de edad atendidas en el servicio de Reproducción Humana del Instituto Nacional de Perinatología Isidro Espinosa de los Reyes que tuvieran una determinación del perfil tiroideo con anticuerpos antitiroideos en la primera consulta de infertilidad. RESULTADOS: la prevalencia de enfermedad tiroidea autoinmunitaria en mujeres infértiles fue de 19%. El 48% tuvieron seropositividad para anticuerpos antitiroideos, 32% para anticuerpos antitiroglobulina más anticuerpos antiperoxidasa y 20% restante solo para anticuerpos antitiroglobulina. En el grupo de pacientes con enfermedad tiroidea autoinmunitaria se observó una prevalencia de hipotiroidismo clínico de 8% y subclínico de 48%. La media de TSH para las mujeres con enfermedad tiroidea autoinmunitaria fue de 4.6 μUI/L. Las mujeres con enfermedad tiroidea autoinmunitaria aislada eutiroideas representaron 8.3% de la población y tuvieron una alta tasa de abortos espontáneos previos (45.5%) y de fracaso en técnicas de reproducción asistida (70%). CONCLUSIÓN: la determinación de la autoinmunidad tiroidea debe ralizarse de manera rutinaria en la población de mujeres.

Abstract OBJECTIVE: To estimate the prevalence of autoimmune thyroid disease in subfertile patients who come to the Human Reproduction service of the National Institute of Perinatology Isidro Espinosa de los Reyes, Mexico city. MATERIAL AND METHODS: A retrospective, cross-sectional, observational, ambispective study evaluating 18- to 43-year-old women from the INPer "Isidro Espinosa de los Reyes" human reproduction service with a thyroid profile determination with anti-thyroid antibodies in The first consultation of infertility. RESULTS: The prevalence of TEE in the population of infertile women is 19%. 48% have seropositivity for Ac-TPO, 32% for Ac-tiroglobulina plus Ac-TPO and the remaining 20% only for Ac-tiroglobulina. A prevalence of clinical hypothyroidism of 8% and subclinical of 48% was observed in the group of patients with ATE. The mean TSH for women with ATE was 4.6 μUI/L. Women with isolated euthyroid ETA represent 8.3% of the population and have a high rate of previous spontaneous abortions (45.5%) as well as failure in assisted reproduction techniques (70%). CONCLUSION: Determination of thyroid autoimmunity should be routinely performed in the female population.

Disfunción tiroidea subclínica / Subclinical thyroid dysfunction

La disfunción tiroidea subclínica es una alteración funcional de alta prevalencia en las consultas médicas de los centros de salud, observable solo mediante la realización de pruebas complementarias de laboratorios, caracterizadas por una elevación de la TSH mayor a 4.0mU/L ó menor a 0.4mU/L con valores normales de T3 y T4 libres, aunque existe la tendencia actual a la disminución de estos rangos de referencia según estudios epidemiológicos en cada población en particular; su tratamiento y control por el especialista son mandatorios en aquellos individuos con valores séricos de TSH superiores a 10mU/L ó menores de 0.1mU/L. La presente revisión bibliográfica tiene como propósito resumir los conocimientos actuales con relación a la prevalencia, factores de riesgo, diagnóstico, clasificación, tratamiento y seguimiento de las patologías incluidas en la disfunción tiroidea subclínica (hipotiroidismo e hipertiroidismo) y sus consecuencias sistémicas(AU)

Thyroid dysfunction is highly prevalent in the health consultation and it is only proven by laboratory essays, were TSH is higher than 4 mU/L, with a normal T3 and free T4; although there is a current tendency to take in account lower values depending of the epidemiological studies of each population. The diagnosis and treatment are mandatory in subjects with a TSH higher than 10 mU/L or lower than 0,1mU/L. This review has the purpose of summarizing the current knowledge of prevalence, risk factors, diagnosis, treatment and follow-up of hypo and hyperthyroidism, as well as their sistemic consequences(AU)

Patología tiroidea en el síndrome de ovario poliquístico

Objetivo: Determinar la función y ecoestructura tiroidea en pacientes con síndrome de ovario poliquístico, así como la asociación con la resistencia a la insulina. Métodos: Se determinó función y ecoestructura tiroidea en 64 pacientes con diagnóstico reciente de síndrome de ovario poliquístico, sin tratamiento, divididas en dos grupos de 32 pacientes cada uno según la presencia de resistencia a la insulina, el grupo 1(G1) con HOMA-IR >2,5 y grupo 2 (G2)con HOMA-IR<2,5. Resultados: Se observó en la función tiroidea, en el G1, 15/32 (46,9 %) pacientes con TSH>2,5 μUI/mL. Para el G2 7/32 (21,9 %) pacientes con TSH>2,5 μUI/mL, (P=0,035). La presencia de AntiTPO positivos se identificó en 11/32 (34,4 %) pacientes del G1 y 6/32 (18,8 %) del G2 (P=0,15), con un total de 53,2 % de enfermedad tiroidea autoinmune identificada de manera independiente a la presencia de resistencia a la insulina. La evaluación ecográfica de la glándula tiroides, reveló la presencia de nódulos en 12/32 (37,6 %) de las pacientes del G1, y 4/32 (12,5 %) del G2 (P= 0,025). Se observó sobrepeso y obesidad en 74,99 % de las pacientes del G1 y 37,49 % del G2 (P= 0,001). Otros parámetros fueron evaluados, como el hirsutismo, el cual se identificó en 96,9 % pacientes del G1, y 62,5 % en el G2 (P=0,002). El índice de andrógenos libres (IAL) fue >3,8 en 20/32 (62,5 %) pacientes del G1 y 14/32 (43,8 %) en el G2 (P=0,13). Conclusiones: La prevalencia de enfermedad tiroidea autoinmune en síndrome de ovario poliquístico es mayor a la identificada en la población general, las bases moleculares se direccionan a un gen común, sin embargo, esto aun no ha sido bien aclarado. Los efectos de la resistencia a la insulina en síndrome de ovario poliquístico no se limitan a la función ovárica, su relación con valores elevados de TSH y cambios ecográficos de la glándula tiroides, en especial para la presencia de patología nodular, justifica su evaluación para un correcto abordaje terapéutico.

Objective: The purpose of this study was to determine thyroid function and echostructure in policystic ovary syndrome, as well as the association of these with insulin resistance. Methods: Echostructure and thyroid function were determined in 64 patients newly diagnosed with policystic ovary syndrome, without treatment, divided into two groups of 32 patients each according to the presence of insulin resistance, group 1 (G1) with HOMA-IR> 2.5 and Group 2 (G2) with HOMA-IR <2.5. Results: The thyroid function in the G1 was, 15/32 (46.9 %) patients with TSH> 2.5 mUI / mL. For G2 7/32 (21.9 %) patients with TSH> 2.5 mUI / mL (P = 0.035). The presence of positive AntiTPO identified in 11/32 (34.4 %) patients in G1 and 6/32 (18.8 %) of G2 (P = 0.15), a total of 53.2 % of Autoimmune Thyroid Disease (ATD) independently of the presence of insulin resistance. Ultrasound evaluation of the thyroid gland, revealed the presence of nodules in 12/32 (37.6 %) of G1, and 4/32 (12.5 %) of G2 (P = 0.025). Overweight and obesity was observed in 74.99 % of patients in the G1 and G2 37.49 % (P = 0.001). Other parameters were assessed, as hirsutism, which was identified in 96.9 % of patients in G1 and G2 62.5 % (P = 0.002). The free androgen index was> 3.8 in 20/32 (62.5 %) patients in G1 and 14/32 (43.8 %) in G2 (P = 0.13). Conclusions: The prevalence of Autoimmune Thyroid Disease in policystic ovary syndrome is higher than in the general population, the molecular basis point to a common gene, however this has not yet been well clarified. The effects of insulin resistance in policystic ovary syndrome are not limited to ovarian function, its relationship with elevated TSH and ultrasound changes of the thyroid gland, especially for the presence of nodular pathology justifies its evaluation for correct therapeutic approach.

[Maternal autoimmune thyroid disease: relevance for the newborn]. / Enfermedad tiroidea autoinmunitaria materna: repercusión en el recién nacido.

BACKGROUND AND OBJECTIVE: Autoimmune thyroid disease is amongst the most frequent endocrine disorders during pregnancy. It is associated with an increase in perinatal morbidity, congenital defects, neurological damage, fetal and neonatal thyroid dysfunction. Maternal thyroid hormones play a key role in child neurodevelopment. We aimed to evaluate the thyroid function and the clinical course of neonates born from mothers with autoimmune thyroid disease during the first months of life in order to define the follow-up. PATIENTS AND METHOD: We monitored thyroid function and clinical status during the first months in 81 newborns of mothers with autoimmune thyroid disease; 16 had Graves disease and 65 autoimmune thyroiditis. RESULTS: A percentage of 4.93 newborns had congenital defects, and 8.64% neonates showed an increase in thyrotropin (TSH) (>9.5 µUI/mL 2 times) and required thyroxin within the first month of life. A 85.7% of these showed a negative newborn screening (due to a later increase of TSH). A higher TSH value in the newborn was related to an older age of the mother, higher levels of thyroid peroxidase (TPO) antibody during pregnancy and lower birth weight. A higher free thyroxine (FT4) value in the newborn was related to fewer days of life and mothers with Graves disease. CONCLUSIONS: We recommend the evaluation of TSH, T4 and TPO antibodies before 10 weeks in all pregnant women with follow-up if maternal thyroid autoimmunity or disorders is detected. It is also recommended to test children's serum TSH and FT4 at 48 h of life in newborns of mothers with autoimmune thyroid disease and repeat them between the 2nd and 4th week in children with TSH>6 µUI/mL. Careful endocrine follow-up is advised in pregnant women and children if hyperthyroidism is detected.

Cirugía en patología tiroidea, 20 años de experiencia en el Hospital Elizabeth Seton / Surgical thyroid pathology, 20 years of experience in the Hospital Elizabeth Seton

El objetivo del estudio fue describir las características clínicas, diagnóstico, tratamiento y postoperatorio de la cirugía de la patología tiroidea, presentar algunas características epidemiológicas en nuestro medio y contrastar con el manejo según la literatura médica. El estudio es observacional, retrospectivo de tipo transversal de 166 pacientes que fueron intervenidos en el servicio de cirugía del Hospital Elizabeth Seton desde el año 1 994 hasta 2 014. Se revisó los expedientes clínicos que contaban con exámenes complementarios como laringoscopia, centellografía, ecografía y punción con aguja fina, el protocolo quirúrgico y el seguimiento postoperatorio; se incluyó a la totalidad de los pacientes por presentar todos los estudios ya mencionados. Se encontró que el 88% eran de sexo femenino, se presentó bocio multinodular en el 51%, bocio nodular en 34% de los casos, tumor maligno en el 6,02%. Los procedimientos quirúrgicos realizados fueron tiroidectomía parcial 31,8%, lobectomía más istmectomía 54% y tiroidectomía total 13%. Las complicaciones fueron disfonía transitoria que en el 3% seguida de hipoparatiroidismo transitorio en el 2,5% y definitivo en el 1,2%. No se presentó hematomas, ni hemorragias importantes y solo un caso de infección de la herida quirúrgica. Se concluye que en los 20 años de estudio patología tiroidea tratada en la institución se pueden comparar con los datos de otros estudios. Las causas más frecuentes son el bocio multinodular, el manejo se realizó de acuerdo a normas ya establecidas, el porcentaje y tipo de cáncer es el esperable. Las complicaciones están en relación a otros estudios.

The objective was to describe the clinical features, diagnosis, treatment and postoperative thyroid disease surgery, the epidemiology characteristics used in our environment, and contrast according to the medical literature. It is an observational, retrospective and cross-sectional study in 166 patients who were operated in the surgery service from the Elizabeth Seton Hospital since 1 994 to 2 014. It was reviewed the clinical records of patients with tests complete of laryngoscopy, citillograma, ultrasound, needle aspiration, surgical and postoperative follow-up protocol; all patients were included because they had the necessary tests. The results found that 88% were female, the presence of multinodular goiter showed 51 %, nodular goiter in 34% of cases, malignancy in 6.02%. The surgical procedures performed were 31.8% partial thyroidectomy, lobectomy and isthmectomy 54%, and total thyroidectomy 13%. Complications were transient dysphonia in 3% followed by transient hypoparathyroidism in 2.5% and definitive in 1.2% final. No significant bruising or bleeding were reported and only one case of infection of the surgical wound was presented. It is concluded that in the 20 years of study thyroid disease treated at the institution can be compared with data from other studies. The most common causes are the most common causes are multinodular goitre, operation is performed according to established standards, the percentage and type of cancer is expected. The complications are in relation to other studies.

Prevalencia y caracterización de la enfermedad tiroidea nodular y del bocio difuso en un área urbana / Prevalence and characterization of the thyroid nodule and the diffuse goiter in an urban area

Introducción: La enfermedad tiroidea nodular constituye un problema de salud en la población adulta por su alta prevalencia. Su diagnóstico se ha favorecido en las últimas décadas como consecuencia de la realización del ultrasonido del tiroides. La provincia de Sancti Spíritus, no disponía de investigaciones previas para analizar la problemática de esta enfermedad y del bocio difuso en las personas adultas, por lo que un estudio de prevalencia se realizó en la ciudad de Jatibonico. Objetivos: determinar la prevalencia de la enfermedad tiroidea nodular y del bocio difuso en la población adulta de 3 consultorios del área urbana de Jatibonico; así como precisar en las personas con enfermedad tiroidea nodular y con bocio difuso, sus antecedentes personales y familiares, el cuadro clínico de presentación, los signos ultrasonográficos y el valor de la hormona estimulante del tiroides. Métodos: el universo de estudio lo constituyó una población de 18 años o más de edad de ambos sexos, pertenecientes a 3 consultorios escogidos al azar del área urbana de Jatibonico (n= 6 126 personas). La muestra estimada para un intervalo de confianza del 95 por ciento fue de 337 personas, y se logró encuestar a 405 sujetos. A la totalidad se les realizó un ultrasonido del tiroides. A 277 personas se les determinó la hormona estimulante del tiroides. Las personas fueron clasificadas con y sin enfermedad tiroidea; y a su vez, esta última, fue subclasificada en enfermedad tiroidea nodular y bocio difuso. Resultados: la prevalencia de la enfermedad tiroidea en la población estudiada fue de 41,97 por ciento (IC- 95 por ciento: 37,17-46,77 por ciento). Al individualizarla, la enfermedad tiroidea nodular se halló en el 36,79 por ciento (IC- 95 por ciento: 32,09-41,48 por ciento) y el bocio difuso en el 5,18 por ciento (IC- 95 por ciento: 3,02-7,33 por ciento) respectivamente. Los pacientes con enfermedad tiroidea, en su mayoría, se manifestaban asintomáticos (85,3 por ciento) y se distribuyeron en todos los grupos de edades, pero con un ligero predominio en las féminas. La hormona estimulante del tiroides elevada (32,85 por ciento) y subnormal (7,58 por ciento) se constataron en los pacientes estudiados. Conclusión: en la población estudiada, la prevalencia de la enfermedad tiroidea nodular fue mayor que la del bocio difuso(AU)

Introduction: Thyroid nodule disease is a health problem in the adult population due to its high incidence. The diagnosis has improved in the last few decades as a result of the thyroid computer tomography. Previous research studies to analyze the situation of this disease and of diffuse goiter in the adult population did not exist in Sancti Spiritus province, so the prevalence study was conducted in Jatibonico city. Objective: to determine the prevalence of the thyroid nodule disease and of diffuse goiter in the adult populations from 3 physician's offices located in Jatibonico urban area as well as to determine the personal and family histories, the clinical picture of presentation, the ultrasonographic signs and the value of the thyroid-stimulating hormone in those people with thyroid nodule and diffuse goiter. Methods: the universe of study was an 18 years-old and over population of both sexes from 3 randomly selected physician's offices located in the urban area of Jatibonico (n= 6 126 people). The estimated sample for 95 % confidence interval was 337 persons and a total number of 405 individuals were surveyed. All of them were performed thyroid computer tomography. The thyroid-stimulating hormone was detected in 277 people. They were then classified into subjects having and not having the disease, and at the same time, there was sub-classification into thyroid nodule disease and diffuse goiter. Results: the prevalence of thyroid disease in the studied population was 41.97 percent (CI- 95 percent: 37.17-46.77 percent). The sub-classification yielded the presence of thyroid nodule disease in 36.79 percent of subjects (CI- 95 percent: 32.09-41.48 percent) and of diffuse goiter in 5.18 percent (CI- 95 percent: 3.02-7.33 percent), respectively. The majority of patients suffering from this disease was asymptomatic (85.3 percent) and distributed into all the age groups, with slight predominance of females. The high (32.85 percent) and the subnormal (7.58 percent) thyroid-stimulating hormones were detected in the studied patients. Conclusions: in the study population, the prevalence of the thyroid nodule disease was higher than that of the diffuse goiter(AU)

Prevalencia y caracterización de la enfermedad tiroidea nodular y del bocio difuso en un área urbana / Prevalence and characterization of the thyroid nodule and the diffuse goiter in an urban area

Introducción: la enfermedad tiroidea nodular constituye un problema de salud en la población adulta por su alta prevalencia. Su diagnóstico se ha favorecido en las últimas décadas como consecuencia de la realización del ultrasonido del tiroides. La provincia de Sancti Spíritus, no disponía de investigaciones previas para analizar la problemática de esta enfermedad y del bocio difuso en las personas adultas, por lo que un estudio de prevalencia se realizó en la ciudad de Jatibonico. Objetivos: determinar la prevalencia de la enfermedad tiroidea nodular y del bocio difuso en la población adulta de 3 consultorios del área urbana de Jatibonico; así como precisar en las personas con enfermedad tiroidea nodular y con bocio difuso, sus antecedentes personales y familiares, el cuadro clínico de presentación, los signos ultrasonográficos y el valor de la hormona estimulante del tiroides. Métodos: el universo de estudio lo constituyó una población de 18 años o más de edad de ambos sexos, pertenecientes a 3 consultorios escogidos al azar del área urbana de Jatibonico (n= 6 126 personas). La muestra estimada para un intervalo de confianza del 95 por ciento fue de 337 personas, y se logró encuestar a 405 sujetos. A la totalidad se les realizó un ultrasonido del tiroides. A 277 personas se les determinó la hormona estimulante del tiroides. Las personas fueron clasificadas con y sin enfermedad tiroidea; y a su vez, esta última, fue subclasificada en enfermedad tiroidea nodular y bocio difuso. Resultados: la prevalencia de la enfermedad tiroidea en la población estudiada fue de 41,97 por ciento (IC- 95 por ciento: 37,17-46,77 por ciento). Al individualizarla, la enfermedad tiroidea nodular se halló en el 36,79 por ciento (IC- 95 por ciento: 32,09-41,48 por ciento) y el bocio difuso en el 5,18 por ciento (IC- 95 por ciento: 3,02-7,33 por ceinto) respectivamente...

Introduction: thyroid nodule disease is a health problem in the adult population due to its high incidence. The diagnosis has improved in the last few decades as a result of the thyroid computer tomography. Previous research studies to analyze the situation of this disease and of diffuse goiter in the adult population did not exist in Sancti Spiritus province, so the prevalence study was conducted in Jatibonico city. Objective: to determine the prevalence of the thyroid nodule disease and of diffuse goiter in the adult populations from 3 physician's offices located in Jatibonico urban area as well as to determine the personal and family histories, the clinical picture of presentation, the ultrasonographic signs and the value of the thyroid-stimulating hormone in those people with thyroid nodule and diffuse goiter. Methods: the universe of study was an 18 years-old and over population of both sexes from 3 randomly selected physician's offices located in the urban area of Jatibonico (n= 6 126 people). The estimated sample for 95 % confidence interval was 337 persons and a total number of 405 individuals were surveyed. All of them were performed thyroid computer tomography. The thyroid-stimulating hormone was detected in 277 people. They were then classified into subjects having and not having the disease, and at the same time, there was sub-classification into thyroid nodule disease and diffuse goiter. Results: the prevalence of thyroid disease in the studied population was 41.97 percent (CI- 95 percent: 37.17-46.77 percent). The sub-classification yielded the presence of thyroid nodule disease in 36.79 percent of subjects (CI- 95 percent: 32.09-41.48 percent) and of diffuse goiter in 5.18 percent (CI- 95 percent: 3.02-7.33 percent), respectively.