S100A8 and gastric cancer: The present study resulted in four major findings: first, H. pylori is uniformly distributed across the stomach in patients having only dyspeptic symptoms; second, H. pylori has a preference for the fundus and the corpus in patients with gastric cancer; third, in patients with dyspeptic symptoms, H. pylori-cagA has a preferential distribution in the fundus and corpus and there is a high frequency of mixed cagA sizes; fourth, the s1b genotype was predominant in both study groups, and the s1a genotype was present only in the dyspeptic group.