HP and gastric cancer: Primary gastric lymphoma patients with a history of H. pylori infection (Hp-infected and Hp-eradicated) (with gastric cancer, 14/24, 58.3% vs. without gastric cancer, 146/450, 32.4%; p = 0.012) and present H. pylori infection (Hp-infected) (with gastric cancer, 23/24, 100.0% vs. without gastric cancer, 301/450, 66.9%; p = 0.003) had a higher risk of gastric cancer.