19 research outputs found

    Estudo histopatologico do endometrio na menstruação normal e na menorragia

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    Orientador : Jose Lopes de FariaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias MedicasResumo: A histologia do endométrio na fase pré-menstrual e na menstruação foi estudada em 30 raspados uterinos provenientes de mulheres com ciclos menstruais normais. Verificamos que a descamação menstrual inclui, na maioria dos casos, apenas a camada compacta, que é muito irregular ao longo da mucosa. A regeneração do epitélio de revestimento é vista a partir do terceiro dia do ciclo. Ao redor do quinto dia a mucosa já está em fase proliferativa propriamente dita. Este estudo serviu de base para a interpretação de 35 raspados uterinos feitos em pacientes com queixa de menorragia e agrupados de acordo com o dia do ciclo em que foi colhido o material. Dezessete raspados destacam-se por conter fragmentos que não se enquadram nas classificações histológicas habituais. Eles caracterizam-se por apresentar estroma muito celular e compacto, com muitos granulócitos endometriais e permeado por vênulas dilatadas e de parede espessa; as glândulas são contraídas, tem formas variadas e resquícios de secreção no epitélio, poucas estão em repouso ou em fase proliferativa. O epitélio de revestimento em regeneração é visto a partir do terceiro dia do ciclo, em alguns casos. Podem acompanhar fragmentos com aspectos normais para o dia do ciclo. Um achado freqüente em casos de menorragia é a descamação profunda da mucosa. A entidade descrita acima é conhecida na literatura como "Descamação irregular do endométrio", denominação insatisfatória mas que deve continuar em uso para que se evite os transtornos causados pela introdução de novos termos. Sugerimos que a(s) particularidade(S) de cada caso seja(m) acrescentado(s) ao diagnóstico.Abstract: Not informed.DoutoradoDoutor em Ciências Médica

    [relationship Of The Sialomucins (tn And Stn Antigens) With Adenocarcinoma In Barrett's Esophagus].

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    Barrett's esophagus (BE) is a consequence of chronic gastroesophageal reflux and is considered a risk factor for adenocarcinoma. The study of the mucus, especially acid mucins, such as the sialomucins in the goblet cells which characterize BE, showed that in intestinal metaplasia, frequent in the digestive tract, the organ's original epithelium could express Tn and Stn antigens. These antigens have already been detected in gastric and colonic tumors, however references in BE were not found. This research aimed to analyze these antigens in patients with BE and in adenocarcinoma associated with BE. Utilizing immunohistochemistry tests, Tn and Stn antigens were studied in the endoscopic biopsies of 29 patients with BE and seven with adenocarcinoma in BE, as well as eight individuals with normal esophageal epithelium at upper digestive endoscopy. The Stn antigen was positive in the goblet cells of patients with BE in 100% of the cases and the Tn was positive in 48%. In the columnar cells, Stn was always negative, while Tn was positive in 100% of the cases. However, in adenocarcinoma in BE, both antigens were 100% positive. In normal individuals, the Tn antigen was positive and the antigen Stn negative in all cases. It is probable that the BE group in which the Tn antigens in the goblet cells are positive, similarly to the same antigen in the adenocarcinoma group, might indicate a higher susceptibility for potential occurrence of cancer. In the future, trials with sialomucins could be used routinely, thereby contributing as a prognostic factor of adenocarcinoma in BE.53360-

    Autoimmune and non-autoimmune thyroid diseases have different patterns of cellular HLA class II expression

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    CONTEXT: Surface HLA-DR antigen is usually only expressed by antigen-presenting cells (APC). In autoimmune thyroid disease, follicle cells function as APC, thus expressing HLA-DR. However, non-autoimmune thyroid diseases may also express surface class II antigens. OBJECTIVE: To evaluate the presence and pattern of HLA class II expression in autoimmune and non-autoimmune thyroid disorders. DESIGN: Retrospective: histopathological and immunohistochemical analysis. LOCATION: Referral center, university hospital. SAMPLE: Ten histologically normal thyroids, 11 Graves’ disease, 7 Hashimoto’s thyroiditis, 10 atoxic multinodular goiter and 3 toxic adenomas were analyzed by immunohistochemistry, using a monoclonal antibody anti-HLA-DR. MAIN MEASUREMENTS: The presence of these antigens in thyroid follicular cells and their relation to inflammatory infiltrate was evaluated. The pattern of HLA-DR expression in thyroid follicular cells was analyzed: membrane, cytoplasmic or both. RESULTS: Although HLA-DR antigens were sparsely present in one of the 8 normal thyroids, in 6 of the 9 atoxic multinodular goiter and in 2 of the 3 toxic adenomas a net positivity could be seen in large areas. In all 5 Hashimoto’s thyroiditis and in 7 of the 10 Graves’ disease cases. This expression occurred in follicle cells either in contact with inflammatory cells or not. In non-autoimmune thyroid disease, HLA-DR positivity was essentially cytoplasmic, whereas in Graves’ disease and Hashimoto thyroiditis it was mainly in cell membranes. CONCLUSIONS: It is suggested that the HLA class II expression on the surface of follicle cells could be related to auto-antigen presentation to the immune system by these cells, leading to inflammation

    Autoimmune and non-autoimmune thyroid diseases have different patterns of cellular HLA class II expression

    No full text
    CONTEXT: Surface HLA-DR antigen is usually only expressed by antigen-presenting cells (APC). In autoimmune thyroid disease, follicle cells function as APC, thus expressing HLA-DR. However, non-autoimmune thyroid diseases may also express surface class II antigens. OBJECTIVE: To evaluate the presence and pattern of HLA class II expression in autoimmune and non-autoimmune thyroid disorders. DESIGN: Retrospective: histopathological and immunohistochemical analysis. LOCATION: Referral center, university hospital. SAMPLE: Ten histologically normal thyroids, 11 Graves’ disease, 7 Hashimoto’s thyroiditis, 10 atoxic multinodular goiter and 3 toxic adenomas were analyzed by immunohistochemistry, using a monoclonal antibody anti-HLA-DR. MAIN MEASUREMENTS: The presence of these antigens in thyroid follicular cells and their relation to inflammatory infiltrate was evaluated. The pattern of HLA-DR expression in thyroid follicular cells was analyzed: membrane, cytoplasmic or both. RESULTS: Although HLA-DR antigens were sparsely present in one of the 8 normal thyroids, in 6 of the 9 atoxic multinodular goiter and in 2 of the 3 toxic adenomas a net positivity could be seen in large areas. In all 5 Hashimoto’s thyroiditis and in 7 of the 10 Graves’ disease cases. This expression occurred in follicle cells either in contact with inflammatory cells or not. In non-autoimmune thyroid disease, HLA-DR positivity was essentially cytoplasmic, whereas in Graves’ disease and Hashimoto thyroiditis it was mainly in cell membranes. CONCLUSIONS: It is suggested that the HLA class II expression on the surface of follicle cells could be related to auto-antigen presentation to the immune system by these cells, leading to inflammation
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