Long-Term Follow-up of Patients With Autonomous Thyroid Nodules Treated With Radioiodine.

PURPOSE: This article aims to describe the presentation of Plummer disease and its evolution after radioiodine treatment and determine factors that may influence treatment efficacy. PATIENTS AND METHODS: The sample included retrospective medical records of 165 adult patients with toxic nodular goiter treated with radioiodine between 1997 and 2017, followed up at a single thyroid center. RESULTS: The efficacy of treatment with a single dose of radioiodine was higher than 90%. The mean radioiodine activity was 28.9 ± 3.4 mCi. The mean time between radioiodine performance and hyperthyroidism resolution was 3.6 ± 3.0 months, ranging from 1-12 months. After the first year, 33.9% of the patients were under hypothyroidism, 59.4% under euthyroidism, and 6.7% under hyperthyroidism. Among the nonresponders, the variables that showed statistical difference were the presence of multinodular goiter and the radioiodine activity (mean, 25.5 ± 6.5 mCi; median, 30 [15-30 mCi]). The cumulative rate of hypothyroidism was 48.9% over 20 years of follow-up. CONCLUSIONS: Radioiodine therapy is an effective and safe treatment. In Plummer disease, high rates of euthyroidism are expected after the radioiodine treatment. Therapeutic failure was observed mainly in patients with larger multinodular goiters treated with lower doses of radioiodine. The evolution to hypothyroidism was mostly observed in younger patients with larger and uninodular goiters.

[Hyperlipidemias and dietary patterns: transversal study of Japanese Brazilians]. / Hiperlipidemias e fatores dietéticos: estudo transversal entre nipo-brasileiros.

This study aimed at evaluating the association between hyperlipidemia and dietary patterns of Japanese Brazilians with and without hypothyroidism from Bauru, city in the State of São Paulo. We evaluated 1,330 individuals by means of demographic and dietary measurement, whom were gotten through standardized questionnaires previously tested. Clinical examination and laboratory data were anthropometry, blood pressure, fasting and 2-h glucose load, lipid profile and TSH and free T4. The chi-square and the odds ratio were used to evaluate associations between hyperlipidemia with studied variables. The prevalence of hyperlipidemia was 81.5% and it was associated with smokers, overweight, hypothyroid, hypertensive and glucose intolerants. We observed, in crude analysis, relationships with the presence of hyperlipidemia and fat saturated, oleic acid and dietary fiber from grains and cereals. After adjusting for the control variables, we observed relationships between hyperlipidemia (hypercholesterolemia and hypertriglyceridemia) with habitual intake of total fat, oleic acid, saturated fat, trans fat, dietary fiber and alcohol. As a conclusion, changes in the style of life, particularly in the dietary habits, can improve lipidic profile and that lipids intake can be a risk factor for hyperlipidemia. Prospectives studies will help test the hypothesis in Japanese Brazilians from Bauru.

[Incidence of malignant lesions in patients with clinically benign thyroid nodules: observational and prospective study in a cohort of 50 patients followed during two years]. / Incidência de malignidade na doença nodular da tiróide com baixa suspeita clínica: estudo observacional prospectivo por dois anos numa coorte de 50 pacientes.

INTRODUCTION: To study the frequency of malignant lesions in patients with clinically benign thyroid nodules and the value of the repetition of fine needle aspiration biopsy (FNAB). METHODS: Observational and prospective 2-year study in a cohort of 50 patients with clinically benign thyroid nodules. Patients were initially submitted to clinical examination, ultrasound (US) and FNAB1 patients, followed by a second FNAB and US. RESULTS: Palpation is not a good test for diagnosis and follow-up of thyroid nodules. On the other hand, the initial consideration that these patients should harbor benign lesions is a very useful parameter, since 47/50 patients (94%) did not present malignant lesions during the follow-up. FNAB1 and FNAB2 were concordant in 33/39 patients when FNAB1 was negative (85%); 11 patients were operated, 8 by suspicious FNAB and 3 due to nodule growth. We observed 2 patients with non-invasive papillary microcarcinoma and 1 patient with papillary carcinoma outside of the main nodules. CONCLUSION: there was concordance between initial clinical benign diagnosis, FNAB and the follow-up. In one case there was a papillary carcinoma. In addition, ultrasonography should be considered for all patients with suspected thyroid nodules. Finally, we demonstrated that a second cytology usually confirms the result of the first cytology in benign thyroid nodules.

[Evaluation of clinical, laboratorial and ultrasonographic predicting factors of malignancy in thyroid nodules]. / Avaliação de fatores clínicos, laboratoriais e ultrassonográficos preditores de malignidade em nódulos tiroidianos.

OBJECTIVE: To evaluate the risk of malignancy in thyroid nodules through clinical, laboratory, ultrasonographic and cytological aspects. PATIENTS AND METHODS: 741 nodules of 407 patients. RESULTS: The cytology was benign (60,5%), indeterminate (23,3%), malignant (8,3%) or nondiagnostic (7,6%). The prevalence of cancer in indeterminate citology was 18,5% (16% in follicular lesions, 44% in suspicious). The diagnosis of malignancy was 17,2% (n = 70). The frequency of cancer in women (15,2%) was lower than in men (27,9%). There was an inverse relation between age and cancer risk. There was no statistical significance in the prevalence of cancer according to number, size of nodules or TSH levels. Hypoechogenicity and microcalcifications on ultrasound were risk factors. CONCLUSION: The risk of malignancy was higher in men, hypoechoic nodules, with microcalcifications and was inversely related to age. The TSH level was not an independent factor predictive of malignancy.

Subclinical thyroid dysfunctions are independent risk factors for mortality in a 7.5-year follow-up: the Japanese-Brazilian thyroid study.

OBJECTIVE: The currently available data concerning the influence of subclinical thyroid disease (STD) on morbidity and mortality are conflicting. Our objective was to investigate the relationships between STD and cardiometabolic profile and cardiovascular disease at baseline, as well as with all-cause and cardiovascular mortality in a 7.5-year follow-up. DESIGN: Prospective, observational study. METHODS: An overall of 1110 Japanese-Brazilians aged above 30 years, free of thyroid disease, and not taking thyroid medication at baseline were studied. In a cross-sectional analysis, we investigated the prevalence of STD and its relationship with cardiometabolic profile and cardiovascular disease. All-cause and cardiovascular mortality rates were assessed for participants followed for up to 7.5 years. Association between STD and mortality was drawn using multivariate analysis, adjusting for potential confounders. RESULTS: A total of 913 (82.3%) participants had euthyroidism, 99 (8.7%) had subclinical hypothyroidism, and 69 (6.2%) had subclinical hyperthyroidism. At baseline, no association was found between STD and cardiometabolic profile or cardiovascular disease. Multivariate-adjusted hazard ratios (HRs (95% confidence interval)) for all-cause mortality were significantly higher for individuals with both subclinical hyperthyroidism (HR, 3.0 (1.5-5.9); n=14) and subclinical hypothyroidism (HR, 2.3 (1.2-4.4); n=13) than for euthyroid subjects. Cardiovascular mortality was significantly associated with subclinical hyperthyroidism (HR, 3.3 (1.4-7.5); n=8), but not with subclinical hypothyroidism (HR, 1.6 (0.6-4.2); n=5). CONCLUSION: In the Japanese-Brazilian population, subclinical hyperthyroidism is an independent risk factor for all-cause and cardiovascular mortality, while subclinical hypothyroidism is associated with all-cause mortality.

Parity is not related to autoimmune thyroid disease in a population-based study of Japanese-Brazilians.

BACKGROUND: It has been suggested that the female preponderance for autoimmune thyroid disease might be associated with hormonal differences, abortion, and fetal microchimerism. Findings emerging from the few epidemiological studies on this matter, however, are controversial. In this study, we investigated the hypothesis whether parity, abortion, and the use of estrogens are associated with a higher risk for thyroid autoimmunity. METHODS: This cross-sectional population-based study examined 675 women from a Japanese-Brazilian population aged above 30 years. Thyroid peroxidase antibodies (TPOAbs), thyroglobulin antibodies (TgAbs), thyrotropin, and free T4 were measured by immunofluorimetric assays. Urinary iodine concentration was measured using a colorimetric method. Data were analyzed in logistical regression models to obtain the odds ratio (OR) and 95% confidence intervals. RESULTS: TPOAbs and TgAbs were present in 11.6% and 13.6% of women, respectively. After adjustment for age, smoking, and urinary iodine concentration, the OR for positive TPOAb (OR, 1.22 [95% confidence interval, 0.73­2.02]) and for positive TgAb (OR, 1.01 [0.63­1.62]) among women who had one or more parities did not differ from those who had never given birth. In addition, we found no association between the presence of thyroid antibodies and previous abortions or the use of estrogens. CONCLUSIONS: Parity, abortion, and the use of estrogens are not associated with thyroid autoimmunity in this population. These findings reinforce previous reports that advocated against a key role of fetal microchimerism in the pathogenesis of autoimmune thyroid disease.

Macrovascular disease in a Japanese-Brazilian population of high prevalence of metabolic syndrome: associations with classical and non-classical risk factors.

BACKGROUND: The Japanese-Brazilian Diabetes Study detected high prevalence of metabolic syndrome (MS) in a population of Japanese ancestry living in Brazil. We describe the prevalence of macrovascular disease (MVD) and its association with classical and non-classical cardiovascular risk factors in this population. METHODS: An overall of 1163 individuals were studied; diagnosis of MVD was based on a score obtained from medical history, ankle-brachial pressure index and electrocardiogram, defining three groups: no MVD, possible MVD and definite MVD. RESULTS: Prevalence of MVD was 14.3% (possible MVD: 11.2%; definite MVD: 3.1%). Individuals with MS had higher rates of MVD (16.9% versus 11.2%; p<0.05). Comparing to no MVD, age, 2 h plasma glucose, anti-LDL(+) and anti-LDL(-) levels, and urinary albumin-to-creatinine ratio were higher in both categories with MVD; waist-to-hip ratio, fasting plasma glucose, HbA1c, total-to-HDL cholesterol ratio and triglycerides were higher in that with definite MVD; systolic blood pressure and homocysteine were higher in that with possible MVD. Using logistic regression, systolic blood pressure, smoking habit and anti-LDL(+) were independently associated with MVD. CONCLUSION: MVD is highly prevalent in Japanese-Brazilians and its association with MS was confirmed. A novel marker of lipoprotein modifications--anti-LDL(+) antibody--could be useful in identifying individuals at higher risk.

Avaliação de fatores clínicos, laboratoriais e ultrassonográficos preditores de malignidade em nódulos tiroidianos / Evaluation of clinical, laboratorial and ultrasonographic predicting factors of malignancy in thyroid nodules

OBJETIVO: Avaliar risco de malignidade de nódulos tiroidianos por meio de aspectos clínicos, laboratoriais, ultrassonográficos e citológicos. PACIENTES E MÉTODOS: 741 nódulos de 407 pacientes. RESULTADOS: A citologia foi benigna (60,5 por cento), indeterminada (23,3 por cento), maligna (8,6 por cento) ou não diagnóstica (7,6 por cento). A prevalência de câncer nas citologias indeterminadas foi 18,5 por cento (16 por cento nas lesões foliculares, 44 por cento nas suspeitas). O diagnóstico de malignidade foi 17,2 por cento (n = 70). A frequência de câncer em mulheres (15,2 por cento) foi menor do que em homens (27,9 por cento). Houve uma relação inversa entre idade e risco de câncer. Não houve significância estatística na prevalência de câncer de acordo com número, tamanho dos nódulos ou níveis de TSH. Hipoecogenicidade e microcalcificações ao ultrassom foram fatores de risco. CONCLUSÃO: O risco de malignidade foi maior em homens, nódulos hipoecogênicos, com microcalcificações e inversamente relacionado à idade. O nível de TSH não foi um preditor independente de malignidade.

OBJECTIVE: To evaluate the risk of malignancy in thyroid nodules through clinical, laboratory, ultrasonographic and cytological aspects. PATIENTS AND METHODS: 741 nodules of 407 patients. RESULTS: The cytology was benign (60,5 percent), indeterminate (23,3 percent), malignant (8,3 percent) or nondiagnostic (7,6 percent). The prevalence of cancer in indeterminate citology was 18,5 percent (16 percent in follicular lesions, 44 percent in suspicious). The diagnosis of malignancy was 17,2 percent (n = 70). The frequency of cancer in women (15,2 percent) was lower than in men (27,9 percent). There was an inverse relation between age and cancer risk. There was no statistical significance in the prevalence of cancer according to number, size of nodules or TSH levels. Hypoechogenicity and microcalcifications on ultrasound were risk factors. CONCLUSION: The risk of malignancy was higher in men, hypoechoic nodules, with microcalcifications and was inversely related to age. The TSH level was not an independent factor predictive of malignancy.

Hiperlipidemias e fatores dietéticos: estudo transversal entre nipo-brasileiros / Hyperlipidemias and dietary patterns: transversal study of japanese brazilians

Este estudo teve como objetivo avaliar a associação entre hiperlipidemia e dieta de nipo-brasileiros de Bauru, município do Estado de São Paulo. Foram obtidos de 1.330 indivíduos dados mediante questionários previamente testados (dados demográficos e dietéticos). Os exames físicos e laboratoriais incluíram a coleta (ou dosagem) antropométrica, de pressão arterial, de glicemia de jejum e de 2 horas, de perfil lipídico e de TSH e T4 livre. Utilizaram-se teste qui-quadrado e medida de odds ratio para avaliar associação entre as variáveis estudadas e presença de hiperlipidemia. Foi encontrado 81,5 por cento de hiperlipidêmicos e acometeu, principalmente, indivíduos tabagistas, com excesso de peso, hipotireoidismo, hipertensão arterial e intolerância a glicose. Observaram-se, mediante análise bruta, relações entre hiperlipidemia e ácido graxo saturado, ácido oléico e fibras de grãos e cereais. Após o ajuste para as variáveis de controle, observaram-se associações entre hiperlipidemia e consumo de lípides (totais, ácido oléico, saturados e trans), fibras e álcool. Conclui-se que mudanças no estilo de vida, particularmente no hábito alimentar, podem levar a uma melhora do quadro hiperlipidêmico e que o consumo de lípides pode ser um dos principais fatores para o aumento da hiperlipidemia. Estudos prospectivos auxiliarão para testar essas hipóteses nos nipo-brasileiros de Bauru.

This study aimed at evaluating the association between hyperlipidemia and dietary patterns of Japanese Brazilians with and without hypothyroidism from Bauru, city in the State of São Paulo. We evaluated 1,330 individuals by means of demographic and dietary measurement, whom were gotten through standardized questionnaires previously tested. Clinical examination and laboratory data were anthropometry, blood pressure, fasting and 2-h glucose load, lipid profile and TSH and free T4. The chi-square and the odds ratio were used to evaluate associations between hyperlipidemia with studied variables. The prevalence of hyperlipidemia was 81.5 percent and it was associated with smokers, overweight, hypothyroid, hypertensive and glucose intolerants. We observed, in crude analysis, relationships with the presence of hyperlipidemia and fat saturated, oleic acid and dietary fiber from grains and cereals. After adjusting for the control variables, we observed relationships between hyperlipidemia (hypercholesterolemia and hypertriglyceridemia) with habitual intake of total fat, oleic acid, saturated fat, trans fat, dietary fiber and alcohol. As a conclusion, changes in the style of life, particularly in the dietary habits, can improve lipidic profile and that lipids intake can be a risk factor for hyperlipidemia. Prospectives studies will help test the hypothesis in Japanese Brazilians from Bauru.

Incidência de malignidade na doença nodular da tiróide com baixa suspeita clínica: estudo observacional prospectivo por dois anos numa coorte de 50 pacientes / Incidence of malignant lesions in patients with clinically benign thyroid nodules: observational and prospective study in a cohort of 50 patients followed during two years

OBJETIVOS: Verificar a ocorrência de lesões malignas em pacientes com nódulos tiroidianos clinicamente benignos e o valor da repetição da citologia aspirativa da tiróide (PAAF). MÉTODOS: Estudo observacional prospectivo por 2 anos em coorte de 50 mulheres com nódulos tiroidianos clinicamente benignos, com exame clínico, ultra-sonografia (US) e PAAF inicial, seguidas por acompanhamento clínico, US e repunção dos mesmos nódulos (PAAF2). RESULTADOS: A palpação não é bom método para o seguimento dos nódulos quando comparada ao US. O quadro clínico foi parâmetro de confiança, pois 47/50 pacientes (94 por cento) evoluíram sem malignidade durante o seguimento. PAAF1 e PAAF2 concordaram em 33/39 pacientes quando PAAF1 foi negativa (85 por cento); 11 pacientes foram operadas, 8 por PAAF suspeita e 3 por aumento do volume nodular durante o seguimento. O anátomo-patológico (AP) foi benigno nas lesões suspeitas (8 adenomas e 3 bócios colóides). Houve 2 casos de microcarcinoma papilífero não invasivo em área distante dos nódulos e 1 caso de carcinoma papilífero não invasivo em bócio multi-nodular. CONCLUSÕES: Houve concordância entre características clínicas de benignidade com PAAF, US e acompanhamento clínico ou cirurgia; numa paciente encontramos carcinoma papilífero. O US deve ser considerado em pacientes com suspeita de nódulos de tiróide ao exame clínico; na maioria das vezes quando o resultado da PAAF1 é negativo para malignidade, o segundo exame citológico confirma o primeiro.

Tratamento do diabetes insipidus central com análogo da arginina vasopressiva: 1-desanimo - 8D- arginina - vasopressina, DDAVP / Treatment of central diabetes insipidus with the analog of arginine vasopressin: 1-desamino - 8D - arginine vasopressin, DDAVP

Um análogo da arginina vasopressina foi sintetizado. este produto sintético, o DDAV - 1-desamino-8D arginina vasopressina, foi utilizado em 4 pacientes com diabetes isipidus sensível ao hormônio antidiurético. Todos os pacientes apresentaram uma boa resposta clínica com a medicaçäo, sem apresentar nenhum sintoma colateral. A menor dose utilizada (0,05 ml - correspondente a 5 microng da droga) foi capaz de elevar a osmolaridade urinária para valores acima de 500 mOsm/KgH2O. Esta dose foi administrada por via intranasal e apresentou uma duraçäo de sua açäo de aproximadamente 8-12 horas. A associaçäo do DDAVP com clorpropamida potencializou a açäo antidiurética do análogo, assim como aumentou o tempo de duraçäo da droga. Assim, o DDAVP ou a sua associaçäo com a clorpropamida, por todas estas características citadas, pode ser considerada a medicaçäo ideal no tratamento do diabetes insipidus responsivo ao hormônio antidiurético

Implantaçäo do programa de rastreamento do hipotiroidismo congênito na Fundaçäo Hospitalar do Distrito Federal: metodologia, resultados, dificuldades e propostas: estudo comparativo de recém-natos de outros Estados / Impantation of the screening program of congenital hypothyroidism in the Fundaçao Hospitalar do Distrito Federal: methodology, results, difficulties and proposals: comparative study with newborns of other States

Foram estudados 71.262 recém-nascidos (RN) vivos através de dosagem de TSH pelo método imunofluorométrico no sangue do cordão umbilical colhido em papel de filtro, considerando-se valor de corte 40 mUI/ml, durante o período de 1990-1991. Deste total, 29.870 provenientes de sete maternidades da Fundação hospitalar do Distrito Federal (FHDF) e 41.392 de areas suficientes de iodo, consideradas controle. A implantação do programa foi realizada de forma gradativa nas maternidades, observando-se porcentagem total de cobertura de 62 por cento com índices variáveis entre as maternidades, provavelmente devido a problemas administrativos. Dentre os 29.870 RN da FHDF, 0,144 por cento apresentaram valores acima de 40 mUI/L, frequência de 1:695 casos, enquanto no grupo controle observamos 0,075 por cento e frequência de 1:1335 casos. Nos primeiros, encontramos 10 casos com valores de TSH acima de 100 mUI/L, com freqúência de 1:2.980 casos diagnosticados da doença, e no grupo controle, cinco casos e frequência de 1:8.278. O rastreamento de hipotiroidismo congênito tem condições de instalar-se definitivamente no Distrito Federal com algumas medidas de ajuste ao programa. Observamos maior incidência da doença no Distrito Federal em relação as regiões suficientes de iodo no Brasil, tornando-se necessário a comprovação de deficiência de iodo nessa região.

Desenvolvimento e aplicaçäo de um método imunofluorométrico para a dosagem de tirotrofina humana (TSH) no soro e em sangue total colhido em papel de filtro / Development and aplication of the immunofluorometric method for the measurement of thirotopin (TSH) in serum and in total blood collected in filter paper

Visando o desenvolvimento de um ensaio específico, rápido e sensível para a dosagem de tirotrofina (TSH) tanto no soro como em amostras de sangue total colhidas de recém-nascidos, em papel de filtro, primeiramente produzimos anticorpos monoclonais contra TSH. Empregando um dos anticorpos produzidos (B6P4), altamente específico contra TSH humano, como anticorpo de captura em fase sólida (placas de microtitulaçao), e um anticorpo monoclonal contra subunidade alfa de TSH marcado com Európio, de origem comercial, desenvolvemos um ensaio imunofluorométrico. Tal ensaio, quando aplicado a amostras de soro lOOmuL), apresenta uma sensibilidade de O,05 mUI/L, com coeficiente de variaçäo (CV) intraensaio inferior a 10 por cento entre os valores de 0,1 a 400 mUI/L e interensaio de 17,3 por cento, 10,1 por cento e 11,4 por cento para soros de valores médios de O,82, 13,7 e 36,2 mUI/L, respectivamente. Quando aplicado a amostras de sangue total colhido em papel de filtro, a sensibilidade é de 2 mUI/L com o emprego de discos de 3mm de diâmetro, o CV intraensaio inferior a 10 por cento entre os valores 10 e 100 mUI/L e o interensaio de 1O,8 por cento para um sangue de valor de 80 mUI/L; em ambos os casos o tempo total de execuçäo é de menos de 24 horas. A aplicaçäo da metodologia a mais de 13.000 amostras colhidas em papel de filtro, e a soros de diferentes tipos de patologias tiroideanas, mostrou que a mesma é superior todos os aspectos ao radioimunoensaio até entäo empregado.