A gastric or duodenal ulcer is a breach in the epithelium of the gastric or duodenal mucosa that penetrates the muscularis mucosae, which is confirmed on endoscopy. Gastric and duodenal ulceration is collectively known as peptic ulcer disease.1
This is a companion discussion topic for the original article at https://patient.info/doctor/gastroenterology/peptic-ulcer-disease