Figure 5a. Heterotopic gastric mucosa in Meckel diverticulum. (a, b) Photomicrographs (original magnification, x40; H-E stain) show gastric fundic mucosa surfaced by foveolar cells (straight arrow). Oxyntic glands (curved arrow in b) contain eosinophilic parietal cells adjacent to basophilic chief cells. (c) Photomicrograph (original magnification, x40; H-E stain) shows small intestinal epithelium with goblet cells (*) adjacent to typical gastric epithelium (arrow). (d) Photomicrograph (original magnification, x16; H-E stain) shows erosions in the mucosa (arrowhead) with underlying heterotopic gastric antral glands (arrow).