Serrated adenoma of the stomach: Case report and literature review

Figure 1 Endoscopic view. A: Gastric polyp; B: Gastric polyp after indigocarmine staining.

Figure 2 The histological examination of the gastric polypoid lesion revealed a serrated adenoma showing protruding glands with lateral saw tooth-like notches due to scalloped epithelial indentations with high-grade dysplasia. A: Adenoma showing serrated glands lined with high-grade dysplasia [hematoxylin and eosin (HE) × 10]; B: High power view of the adenomatous component showing serrated glands with indentations lined with high-grade dysplasia (HE × 20); C: View of a single elongated gland with saw-tooth-like configuration lined with high-grade dysplasia (HE × 20).

Figure 3 Low-power view of serrated adenoma with invasive carcinoma (hematoxylin and eosin × 10).

Figure 4 High power view of the invasive component with retained serrated configuration (hematoxylin and eosin × 10).