Although scientists still do not fully understand why some people get gastric cancer and others do not, Helicobacter pylori, the bacterium linked to ulcers, has been implicated in stomach cancers.

尽管科研人员还没有完全弄懂为什么某些人会得胃癌，而另一些人不会，但是已知，造成溃疡的幽门螺杆菌与胃癌有一定关联性。