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Chronological steps in the progression to gastric cancer in humans and gerbils. Representative hematoxylin and eosin (H&E)-stained human (left ) or gerbil (right ) gastric tissue sections showing the various stages in the progression and transformation from normal gastric mucosa to gastric adenocarcinoma, including gastritis, atrophic gastritis, dysplasia, and adenocarcinoma at 20× magnification
