GWEN SHOCKEY / SCIENCE PHOTO LIBRARY GWEN SHOCKEY / SCIENCE PHOTO LIBRARY
Illustration of the stomach with several ulcers present. At top is the oesophagus and just below that is an esophageal ulcer. In the stomach a gastric ulcer is present, and at the bottom left is a duodenal ulcer in the small intestine. Inset is a close up of a peptic ulcer.
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