HP and MALT lymphoma: Several studies state that H pylori plays a crucial role in the development of gastric MALT lymphoma, and multiple guidelines now emphasize that curing H pylori is the established primary approach for patients with Hp-positive gastric MALT lymphoma.[8,9]Recent studies have reported that MALT lymphoma, which is caused by H pylori, is characterized by the infiltration of immune effector cells and an increase in inflammation-promoting mediators.