This type is extranodal - mostly happening in the lining of the stomach among individuals with chronic inflammation, like those with Helicobacter pylori infection, a bacteria that causes chronic gastritis.

这种类型是结外的，主要发生在慢性炎症患者的胃粘膜中，比如感染了幽门螺杆菌的患者；幽门螺杆菌是一种导致慢性胃炎的细菌。