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Heterotopic gastric mucosa in middle esophagus. A: Arrows denote the transition between the columnar foveolar epithelium and the esophageal stratified squamous epithelium (H&E, × 40); B: Columnar epithelium merges with stratified squamous epithelium. At the lamina propria cardiac and fundic-type glands are evident (H&E, × 200).
