Physician Assistant Studies
Introduction. Helicobacter Pylori (HP) infection has been associated with chronic inflammation of the stomach and may also be associated with the development of gastrointestinal malignancy.
Purpose of Study: This study will examine the literature related to HP infection associated with the cancers of the stomach.
Materials and Methods: A literature review was conducted on the reported research of HP infection associated with gastric cancer cases.
Results and Discussions: Helicobacter pylori is a gastric pathogen that colonizes approximately 50% of the world’s population. Infection with H. pylori causes chronic inflammation and significantly increases the risk of developing duodenal and gastric ulcer disease and gastric cancer. Infection with H. pylori is the strongest known risk factor for gastric cancer, which is the second leading cause of cancer-related deaths worldwide. Once H. pylori colonizes the gastric environment, it persists for the lifetime of the host, suggesting that the host immune response is ineffective in clearing this bacterium. In this review, we discuss the host immune response and examine other host factors that increase the pathogenic potential of this bacterium, including host polymorphisms, alterations to the apical-junctional complex, and the effects of environmental factors. In addition to host effects and responses, H. pylori strains are genetically diverse. 
Conclusions: The exact mechanism to explain the role of H. pylori in carcinogenesis is incompletely understood. Multiple studies have demonstrated an association between H. pylori infection and mucosa-associated lymphoid tissue lymphoma (MALToma). The most dramatic evidence supporting a pathogenetic role for H. pylori in MALToma is remission of the tumor following eradication of H. pylori with antibiotic therapy. 
Khashimova, Zilola, "Role of Helicobacter Pylori Infection in Development of Gastrointestinal Malignancy" (2020). Physician Assistant Studies | Faculty Scholarship. 4.