A duodenal ulcer is a type of peptic ulcer that can appear in the duodenum. The duodenum is the upper part of the small intestine that’s connected directly to the stomach where it empties into the ...

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Prepyloric ulcers are a type of peptic or gastric ulcer. These open sores develop in the upper digestive tract, just above the pylorus, which is the opening to the small intestine. The tissues of the ...

A stomach ulcer is a “crater” on the lining of the stomach that develops when the stomach is inflamed, Dr. Plaut says. “In most cases, stomach acid is a key driver of ulcer formation.” While the term ...