Analizar la correlación entre la expresión de p53, Ki67, bcl-2 y CK20, detectadas por técnicas de inmunohistoquímica, con las variables pronósticas clásicas: grado histológico, estadio clínico y recurrencia del tumor. MATERIAL Y MÉTODOS: Estudiamos 57 biopsias de carcinomas transicionales superficiales de vejiga. Las biopsias valoradas correspondían a 36 y 21 carcinomas transicionales de vejiga no recidivantes y recidivantes, respectivamente. Determinados la correlación entre la expresión de p53, Ki-67, bcl-2 y CK20 con el estadio clínico, grado histológico y la recurrencia del tumor. RESULTADOS: Demostramos una correlación estadísticamente significativa entre la expresión de Ki-67 y p53 con el grado histológico y la recidiva del tumor. No demostramos asociación estadísticamente significativa entre la expresión de bcl-2 y CK20 con el grado histológico, estadio clínico y recurrencia del tumor. CONCLUSIONES: La expresión de p53 y Ki-67 aumenta conforme aumenta el grado histológico del tumor y permite predecir la recurrencia de los carcinomas transicionales superficiales de vejiga.
1) This study shows that 44% of all prostate cancer express the cerbB-2 oncoprotein with immunohistochemical technique. 2) These findings suggest that is necessary to standardize the immunohistochemical staining procedure with cerbB-2 in prostate adenocarcinoma. 3) The level of cerbB-2 expression was correlated with Gleason grade and clinical stage.
CD10 and RCC are often expressed by clear cell renal cell carcinomas, and they may be useful markers to suggest a renal origin of carcinomas. RCC is less sensitive than CD10. Staining for both of them is usually focal, and thus sensitivity of these techniques decreases when small samples are investigated, such as tissue arrays. The antigen retrieval method is essential for RCC immunohistochemical detection, obtaining the best results with the use of proteolytic enzymes.
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