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Rev. cuba. med ; 44(5/6)sep.-dic. 2005.
Artigo em Espanhol | LILACS | ID: lil-628848

RESUMO

Se realizó un estudio descriptivo-prospectivo en adultos de ambos sexos, con sospecha clínica y endoscópica de neoplasia maligna gástrica, para describir el comportamiento de la infección por Helicobacter pylori en pacientes con diagnóstico histológico de adenocarcinoma gástrico. Se encontró una frecuencia de adenocarcinoma gástrico de 91 %, localizado principalmente en la región antral 60 %; se constató, mediante prueba de ureasa, que el Helicobacter pylori coloniza con baja frecuencia las zonas alejadas del tumor. Se analizó la histología de la periferia del tumor y se comprobó que 70 % de los adenocarcinomas presentaban Helicobacter pylori en esta zona, al comparar esta frecuencia con la de la región peritumoral (75 %) no existieron diferencias estadísticamente significativas. Se relacionó la presencia de Helicobacter pylori con el tipo de gastritis presente en la mucosa peritumoral, según la localización del tumor, no se observaron diferencias estadísticamente significativas entre la presencia o no de Helicobacter pylori en las distintas regiones donde se estudió la gastritis. En el tipo histológico intestinal se observó un discreto aumento de pacientes con Helicobacter pylori positivo (80 %), no obstante, no existe una relación estadísticamente significativa entre la presencia de Helicobacter pylori y el tipo histológico del tumor. En todas las muestras de biopsia estudiadas, la densidad de Helicobacter pylori fue ligera. Se concluyó que la mayor frecuencia de neoplasia maligna gástrica fue el adenocarcinoma, y no existieron diferencias importantes en la distribución del Helicobacter pylori según el tipo histológico del tumor ni en la gastritis de la mucosa peritumoral.


A descriptive prospective study was conducted in adults of both sexes with clinical and endoscopic suspicion of malignant gastric neoplasia aimed at describing the behavior of infection caused by Helicobacter pylori in patients with histological diagnosis of gastric adenocarcinoma. It was found a frequency of gastric adenocarcinoma of 91 %. 60 % were mainly located in the antral region. It was confirmed by urease test that Helicobacter pylori colonizes with low frequency the zones distant from the tumor. The histology of the tumor periphery was analized and it was proved that 70 % of the adenocarcinomas presented Helicobacter pylori in this zone. On comparing this frequecny with that of the peritumoral region (75 %), no statistically significant differences were observed. The presence of Helicobacter pylori was related to the type of gastritis present in the peritumoral mucosa, according to the localization of the tumor. No statistically significant differences were detected between the presence or not of Helicobacter pylori in the different regions where gastritis was studied. In the intestinal histological type it was found a discreet increase of patients with positive Helicobacter pylori (80 %). However, there is no a statistically significant relation between the presence of Helicobacter pylori and and the histological type of tumor. In all the studied biopsy specimens the Helicobacter pylori density was mild. It was concluded that the highest frequency of malignant gastric neoplasia was the adenocarcinoma. There were no significant differences neither in the distribution of Hel icobacter pylori according to the histological type of tumor, nor in the gastritis of the peritumoral mucosa.

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