PURPOSE:To assess the capsules formed by silicone implants coated with polyurethane foam and with a textured surface.
METHODS:Sixty-four Wistar albinus rats were divided into two groups of 32 each using polyurethane foam and textured surface. The capsules around the implants were analyzed for 30, 50, 70 and 90 days. Were analyzed the following parameters: foreign body reaction, granulation tissue, presence of myofibroblasts, neoangiogenesis, presence of synovial metaplasia, capsular thickness, total area and collagen percentage of type I and III, in capsules formed around silicone implants in both groups.
RESULTS:The foreign body reaction was only present in the four polyurethane subgroups. The formation of granulation tissue and the presence of myofibroblasts were higher in the four polyurethane subgroups. Regarding to neoangiogenesis and synovial metaplasia, there was no statistical difference between the groups. Polyurethane group presented (all subgroups) a greater capsule thickness, a smaller total area and collagen percentage of type I and a higher percentage area of type III, with statistical difference.
CONCLUSION:The use of polyurethane-coated implants should be stimulated by the long-term results in a more stable capsule and a lower incidence of capsular contracture, despite developing a more intense and delayed inflammatory reaction in relation to implants with textured surface.
OBJETIVO: Avaliar a imunoexpressão dos receptores de estrogênio e progesterona em biópsias e peças cirúrgicas de pacientes com câncer de mama pré e pós-quimioterapia neoadjuvante e correlacionar suas alterações com o padrão de resposta à quimioterapia e diagnóstico de menopausa. MÉTODOS: Selecionaram-se 47 pacientes com diagnóstico histopatológico de carcinoma primário de mama localmente avançado. Para cada paciente existiam dois blocos: o espécime da biópsia e o da ressecção cirúrgica. A partir destes blocos foi avaliada a expressão dos receptores hormonais por imunoistoquímica com a técnica da streptoavidina-biotina-imunoperoxidase e anticorpos primários anti-RE e anti-RP. A análise estatística utilizou o teste paramétrico t de Student e o não-paramétrico exato de Fisher, com nível de significância de 5%. RESULTADOS: Das 47 pacientes, 30 apresentavam imunoexpressão positiva dos receptores hormonais. Observou-se redução significativa tanto nos níveis de receptor de estrogênio e progesterona quanto em sua imunoexpressão. Em 53,3% observaram-se mudanças nos níveis expressos de receptor de estrogênio, 56,6% em receptor de progesterona, 26,6% na imunoexpressão do receptor de estrogênio e 33,3% na imunoexpressão do receptor de progesterona. Não foi encontrada significância estatística ao correlacionar-se a influência da resposta à quimioterapia e do diagnóstico de menopausa nas pacientes com a variação na expressão dos receptores hormonais. CONCLUSÃO: A quimioterapia neoadjuvante alterou significativamente a imunoexpressão dos receptores hormonais nas pacientes da amostra, reduzindo sua positividade nas células tumorais.
PURPOSE: To evaluate the deposition of collagen fibers at pig's vocal folds after topical use of mitomycin or 5-fluorouracil, when partial exeresis of mucosa layer had been promoted by CO2 laser. METHODS: There were used 18 Larger white pigs which were anesthetized and submitted to mucosa fragment's exeresis, bilaterally, at its free border. The animals were divided into 3 groups, each one with 6 animals: control group, without topical drug application; mitomycin group; and 5-fluorouracil group. After 30 days, the animals were subjected to euthanasia, and samples of the vocal folds were collected and stained by picrosirius red technique with polarization for quantification of total collagen deposition. RESULTS: In control group, the mean rate of right vocal fold's collagen deposition at submucosa consisted in a 3428.66 micrometers area. There was found an area whose size had, in average, 2196.36 micrometers, in mitomycin group, and 2269.19 micrometers, in 5-fluorouracil group. CONCLUSION: Mitomycin and 5-fluorouracil had promoted beneficial change in vocal fold's cicatrization with less collagen deposition, but there was no significant statistically difference when they were compared between themselves.
INTRODUÇÃOA incidência de doenças associadas às modificações na dieta humana, como a obesidade, hipertensão, diabetes, hipertrigliceridemia e hipercolesterolemia apresentou aumento significativo nos últimos anos. A obesidade mórbida está relacionada com alto risco para doenças degenerativas e para alguns tipos de câncer 4,17 . Há ainda muita desinformação a respeito da obesidade sendo que, durante muitos anos, ela era associada à falta de caráter, auto-indulgência ou distúrbios psíquicos dos indivíduos por ela acometidos. Sabe-se hoje, que a obesidade decorre de uma série de fatores -genéticos, metabólicos, hormonais e ambientais -ainda não totalmente esclarecidos 9 . Segundo a hipótese do intestino longo, o comprimento do intestino delgado estaria relacionado à obesidade. Existem dados evolutivos, anatômicos e neuroendócrinos a favor desta afirmação 17 .
There is an increased prevalence of anticardiolipin antibodies in the general population with leg ulcers. Clinical characteristics of ulcers as well as platelet count do not help in the identification of these patients.
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