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      Infección por helicobacter pylori asociada con neoplasias gástricas malignas en el estado de Guerrero, México. 2001-2011 Translated title: Infection by helicobacter pylori associated with gastric malignant in Guerrero state, Mexico. 2001-2011

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          Abstract

          Introducción: La asociación entre Helicobacter pylori y las neoplasias gástricas malignas ha sido ampliamente demostrada, en relación con esto, la OMS determinó que el microorganismo es agente carcinógeno comprobado del grupo I. En México la prevalencia de infección por esta bacteria es alta. Objetivo: Evaluación de la relación entre variables sociodemográficas, clínicoendoscópicas e histopatológicas con los diferentes tipos de neoplasias gástricas malignas en pacientes Helicobacter pylori positivos y negativos. Pacientes y métodos: Se desarrolló una investigación en la región Sur de México, de tipo retrospectiva, descriptiva e inferencial; se estudiaron 214 casos con adenocarcinoma gástrico y linfoma asociado a mucosas (MALT, por sus siglas en inglés), diagnosticados en el período 2001-2011, de los cuales 99 presentaron Helicobacter pylori. Se utilizaron técnicas estadísticas para evaluar la posible relación entre variables. Procedimientos: Media aritmética y desviación estándar, porcentajes y sus errores. Técnicas: Prueba de Chi² para tablas de contingencia, correlación de rango de Spearman, estimación de parámetros poblacionales, comparación de porcentajes relacionados. Resultados: Se encontraron asociaciones significativas entre el diagnóstico histológico y edades, serotipo sanguíneo, antecedente de familiares con cáncer y la sintomatología (dispepsia y signos de alarma). Y asociaciones muy significativas entre la presencia de Helicobacter pylori con vivos, fallecidos y el diagnóstico histológico. Se determinó que el adenocarcinoma difuso aparece entre 48,8% y 62,4% con una probabilidad de 95% en la población con esta característica, igualmente el porcentaje de neoplasia/tumor dentro del diagnóstico endoscópico oscila entre 68,4% y 80,6% con una probabilidad de 95%. El intervalo de confianza con 99% de certeza para la edad en que se manifiestan estas enfermedades se mueve entre 56 y 62 años. Conclusiones: Queda demostrado que las características sociodemográficas, clínicoendoscópicas e histológicas de los pacientes con adenocarcinoma y linfoma MALT influyen en el diagnóstico final, evolución y pronóstico. La presencia de Helicobacter pylori en estos pacientes fue determinante para su sobrevivencia.

          Translated abstract

          Introduction:The association between Helicobacter pylori and the gastric malignant has been extensively demonstrated, in relation to this, the WHO determined that the microorganism is a carcinogen agent proved from group I. In Mexico the prevalence of infection by this bacterium it is high Objective: Evaluation of the relationship between the socio-demographic, clinical-endoscopic and histopathological variables with the different kinds of gastric malignant in Helicobacter pylori positive and negative patients. Patients and methods: An investigation was carried out to determine the kind of association in a population of the south region of Mexico. The type of research is retrospective, descriptive and inferential, 214 cases with gastric adenocarcinoma and lymphoma associated to the mucosal (MALT) were studied, they were diagnosed from 2001 to 2011, of which 99 had Helicobacter pylori. Statistical techniques to evaluate the possible relationship between variables were used. Procedures: Arithmetic mean and standard deviation, percentages and its errors. Techniques: Chi square test for contingency tables, correlation of Spearman´s range, population parameter estimation, related percentage comparison. Results: It was found meaningful associations between the histologic diagnostic and ages, blood serotype, antecedent of relatives with cancer and the symptomatology (dyspepsia and alarm signs), and very meaningful association between the presence of Helicobacter pylori with alive, deceased and the histologic diagnostic. It was determined that diffuse adenocarcinoma appears between a 48,8% and 62,4% with a probability of the 95% in the population with this characteristics, likewise, the percentage of neoplasm/toumor within endoscopic diagnosis ranges between 68,4% and 80,6% with a 95% probability. The interval of confidence with the 99% of certainty for the age in which these illnesses appear it moves between 56 and 62 years. Conclusions: It has been proved that the socio-demographic, clinical-endoscopic and histologic characteristics of these patients with adenocarcinoma and lymphoma MALT have an influence in the final diagnostic, evolution and prognostic. The presence of Helicobacter pylori in these patients was determining for their survival.

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          Most cited references35

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          Global cancer statistics in the year 2000.

          D Parkin (2001)
          Estimation of the burden of cancer in terms of incidence, mortality, and prevalence is a first step to appreciating appropriate control measures in a global context. The latest results of such an exercise, based on the most recent available international data, show that there were 10 million new cases, 6 million deaths, and 22 million people living with cancer in 2000. The most common cancers in terms of new cases were lung (1.2 million), breast (1.05 million), colorectal (945,000), stomach (876,000), and liver (564,000). The profile varies greatly in different populations, and the evidence suggests that this variation is mainly a consequence of different lifestyle and environmental factors, which should be amenable to preventive interventions. World population growth and ageing imply a progressive increase in the cancer burden--15 million new cases and 10 million new deaths are expected in 2020, even if current rates remain unchanged.
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            Parasitism by the "slow" bacterium Helicobacter pylori leads to altered gastric homeostasis and neoplasia.

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              Asian patients with gastric carcinoma in the United States exhibit unique clinical features and superior overall and cancer specific survival rates.

              The 5-year survival rate from gastric carcinoma, stratified by stage, is markedly greater in the Far East than in the United States. This survival rate advantage may reflect differences in diagnostic criteria, more complete staging, more radical surgery, or less aggressive tumor biology. A historic cohort of consecutive cases of gastric carcinoma reported to the population-based California Cancer Registries of Orange, San Diego and Imperial Counties from 1984 to 1996 was studied. Factors associated with Asian race were profiled using logistic regression. Multivariate survival analyses were performed using a Cox proportional hazard model. Two thousand four hundred sixteen patients (64%) were non-Latino white; 690 (18%) were Latino; 94 (2.5%) were black; 541 (14%) were of Asian descent: Korean (22%), Vietnamese (20%), Japanese (20%), Chinese (14%), and Filipino (12%). Asian patients were more likely to have localized (lymph node negative) disease (odds ratio [OR], 1.61; 95% confidence interval [CI], 1.23-2.10), less likely to have tumors of the gastroesophageal junction (OR, 0.22; 95% CI, 0.15-0.31,), and less likely to be older than 50 years (OR, 0.58; 95% CI, 0.43-0.77). Asian patients with gastric carcinoma were twice as likely as non-Latino whites to be alive at 5 years (20.9% vs. 10.2%; P < 0.0001). Multivariate analyses indicated that whites had an increased risk of dying from all causes (relative risk [RR], 1.34; 95% CI, 1.16-1.55; P < 0.01) and of dying from cancer in comparison to Asian patients (RR, 1.26; 95% CI, 1.07-1.48; P < 0.05). Asians who received a diagnosis of gastric carcinoma in the United States have less advanced disease than non-Asians. The increased proportion of localized disease and improved survival rates of patients of Asian descent in the United States is consistent with less aggressive tumor biology. Copyright 2000 American Cancer Society.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rhcm
                Revista Habanera de Ciencias Médicas
                Rev haban cienc méd
                Universidad de Ciencias Médicas de la Habana (La Habana )
                1729-519X
                June 2012
                : 11
                : 2
                : 225-236
                Affiliations
                [1 ] Universidad Autónoma de Guerrero Mexico
                [2 ] Universidade Estadual de Maringá Brazil
                [3 ] Instituto Finlay Cuba
                [4 ] Universidad de Ciencias Médicas de La Habana Cuba
                Article
                S1729-519X2012000200007
                e9710316-e8a5-494b-8a58-7df7af674ff8

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Cuba

                Self URI (journal page): http://scielo.sld.cu/scielo.php?script=sci_serial&pid=1729-519X&lng=en
                Categories
                HEALTH CARE SCIENCES & SERVICES

                Health & Social care
                Helicobacter pylori,gastric adenocarcinoma,lymphoma MALT,clinical variables,sociodemographic variables,adenocarcinoma gástrico,linfoma MALT,variables clínicas,variables sociodemográficas

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