Clinical features of upper gastrointestinal serrated lesions: An endoscopy database analysis of 98746 patients

Figure 1 Typical pathological images of serrated lesions in upper gastrointestinal tract. Serrated lesions characterized by epithelial cells with luminal infolding and a serrated growth pattern were shown. A: Serrated hyperplasia in esophagitis (× 40); B: Serrated hyperplasia in the Ménétrier gastropathy: marked foveolar hyperplasia and glandular cysts with serrated lesions in the stomach (× 100); C: Hyperplastic polyp in the stomach: a serrated polyp without overt cytological atypia showed narrowed crypt bases that were predominantly lined with immature cells (× 100); D: Serrated adenoma with low grade dysplasia in the duodenum: a serrated polyp with enlarged nuclei, a pencil-shaped, hyperchromaticity and nuclear stratification (× 100).