The resulting semifluid paste—chyme—is sealed in the stomach by two ringlike sphincter muscles for several hours and then released in short bursts into the duodenum. The first of three ...

which means they’re related to stomach acid. The other type of peptic ulcer is called duodenal ulcer, which affects the small intestines. Stomach ulcers may be easily cured, but they can become ...

Superior mesenteric artery (SMA) syndrome is a condition that affects the duodenum — the section of the small intestine that joins the stomach. The syndrome is caused by the compressing of the ...

RYGB, the most popular technique in the United States, combines the principle of restriction (dramatically decreasing stomach size) with malabsorption (bypassing the entire duodenum). It stands to ...