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What to expect before, during, and after the upper gastrointestinal (GI) endoscopy procedure and how it finds and treats problems in the upper GI tract.

Overview of the digestive system—how food moves through each part of the GI tract to help break down food for energy, growth, and cell repair.

Learn about Zollinger-Ellison syndrome, in which tumors in the pancreas or duodenum increase stomach acid, leading to peptic ulcers, acid reflux, and diarrhea.

Overview of peptic (stomach) ulcers, including the causes, link to NSAID pain medicines, symptoms, treatments, and foods to avoid.

A fact sheet about the relationship between H. pylori infection and gastric cancer, gastric mucosa-associated lymphoid tissue (MALT) lymphoma, and other cancers.

A fact sheet that describes use of high-intensity light in cancer treatment, its advantages and disadvantages, and types of procedures that use it.

Risk factors for stomach (gastric) cancer include certain health conditions (e.g., atrophic gastritis, pernicious anemia, H. pylori infection), genetic factors (e.g., Li-Fraumeni syndrome), or environmental factors (e.g., diet, smoking). Review the evidence on these and other risk factors and interventions to prevent stomach cancer in this expert-reviewed summary.

For stomach (gastric) cancer, there is no standard or routine screening test for the general U.S. population. Review the evidence on the benefits and harms of screening for gastric cancer using barium-meal photofluorography, gastric endoscopy, or serum pepsinogen in this expert-reviewed summary.

A fact sheet that lists some of the cancer-causing chemicals in tobacco smoke and describes the health problems caused by cigarette smoking and the benefits of quitting.