Revisión: Factores asociados a cáncer colorrectal

Introduction: Colorectal cancer (CRC) is the most frequent neoplasm in the digestive tract; it constitutes 9 of 10% of all cancer cases in the world. This type of cancer is considered multicausal since it is associated with intrinsic and extrinsic factors. Among the internal factors, there are genetic, hormonal mutations, and immunological conditions. On the other hand, the external factors are composed of unhealthy diets, alcohol consumption, obesity, sedentary lifestyle, smoking habits, and environmental exposure to carcinogens. The clinical symptoms are not very specific; that is why the diagnosis is focused on risk groups related to age and proven family medical history. Objective: To identify genetic factors and lifestyle factors related to the development of Colorectal cancer (CRC). Methodology: A literature search was carried out in databases such as ScienceDirect, Google Scholar, Redalyc, Scielo, Proquest, in a range of time between 2004 and 2019. The keywords: colorectal cancer, risk factors, epidemiology, mortality, mutation, and incidence were used as helpers for the search. Results: Predisposing genetic factors were observed in about 20% to 25% of people with CRC associated primarily with the APC gene mutation. In terms of sporadic cancer, the results showed that 80% of the cases were related to the uncontrolled consumption of red meat, sausages, and coffee. Additionally, smoking and alcoholic behaviors, stress, and comorbidities, such as obesity and diabetes, were also the cause of the development of this issue. Conclusion: CRC could be caused by internal and external factors. Based on this, the people with a genetic predisposition to this issue should monitor themselves frequently and implement a healthy lifestyle that reduces the probability of suffering from this type of cancerIntroducción: El cáncer colorrectal (CCR) es la neoplasia de mayor frecuencia en vías digestivas, constituyendo del 9 al 10% de todos los cánceres en el mundo. Se considera que es multicausal, pues abarca factores intrínsecos del huésped como mutaciones genéticas, hormonales y condiciones inmunológicas; además de factores externos como dietas poco saludables, consumo de alcohol, obesidad, sedentarismo, tabaquismo y la exposición ambiental a carcinógenos. Las manifestaciones clínicas son poco específicas, razón por la cual el diagnóstico está enfocado en grupos de riesgo relacionados con la edad e historia familiar demostrada. Objetivo: Identificar los factores genéticos y de estilos de vida predisponentes al desarrollo de CCR. Metodología: Se realizó una búsqueda de la bibliografía respectiva en las bases de datos ScienceDirect, Google académico, Redalyc, Scielo, Proquest publicada durante el período 2004- 2019, mediante las palabras clave: Colorrectal cancer, risk factors, epidemiology, mortality, mutation, incidence. Resultados: Se observaron factores genéticos predisponentes entre un 20% a 25% de las personas con CCR asociados principalmente con la mutación de gen APC. En relación al cáncer esporádico, se identifica hasta en un 80% de los casos, relacionado con el consumo no controlado de alimentos como carnes rojas, embutidos, café, además de hábitos como el consumo de cigarrillo y alcohol conjuntamente con el estrés y comorbilidades como la obesidad y la diabetes. Conclusión: La multicausalidad del CCR está centrada en factores tanto internos como externos siendo de relevancia el seguimiento para personas genéticamente predispuestas y la implementación de estilos de vida saludables que reduzcan la mortalidad por esta causa