National Institute of Diabetes | Akateeminen Kirjakauppa

A peptic ulcer is a sore in the lining of your stomach or duodenum.* The duodenum is the first part of your small intestine. Rarely, a peptic ulcer may develop just above your stomach in your esophagus-the organ that connects your mouth to your stomach. Doctors call this type of peptic ulcer an esophageal ulcer.