FRANCOIS L'HOPITAL / ISM / SCIENCE PHOTO LIBRARY FRANCOIS L'HOPITAL / ISM / SCIENCE PHOTO LIBRARY
Endoscopic view down the oesophagus in a patient showing Barrett's oesophagus in which the epithelial lining changes, (metaplasia), due to chronic acid reflux from the stomach. In this case the reflux is due to a hiatus hernia in which the stomach pushes up into the oesophagus. Barrett's oesophagus is considered a precursor of oesophageal cancer.
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