Endoscopy (upper GI)
![Upper GI Endoscopy](https://patient.gastro.org/wp-content/uploads/2021/09/CGH_patiented_UpperGI_2018-769x1024.jpg)
Upper GI endoscopy is a procedure to view the upper digestive tract, which includes the esophagus, stomach and beginning of the small intestine.
Barrett’s esophagus
![Normal esophagus and esophagus with Barrett's](https://patient.gastro.org/wp-content/uploads/2021/08/CGH-PatientEd-Barretts-2020-min-1024x693.jpg)
Barrett’s esophagus is when the cells lining the esophagus — the tube connecting the mouth to the stomach — change into the cells lining the intestine. The test for Barrett’s is an endoscopy.