It is a coiled long tube that winds from the pyloric sphincter of the stomach to the beginning of the large intestine, filling much of the abdominal cavity.
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.
The process of discovery began in 1983 when Barry Marshall, a doctor in Perth, Western Australia, found that many stomach cancers and most stomach ulcers are caused by a bacterium called Helicobacter pylori.
We would seem to always, one of us, have either the upset stomach or throwing up, and the bacteria found in our stomach, H. pylori, which makes me nauseated and painful in the stomach and vomiting.