Fig. 2

Photomicrographs of the larger polyp at the junction of the gastric body/antrum, H&E staining: a protruding mucosal lesion showed a tubulovillous-like structure, ×15 (a); the surface glands proliferated densely, and the glands close to the muscularis mucosa expanded and locally pushed toward the muscularis mucosa, ×40 (b); the tumor cells were columnar epithelium with apical mucin caps in the cytoplasm, the nucleus was enlarged and elongated, located at the base of the cytoplasm, ×400 (c); the mucosa of the tumor base and surrounding were pyloric gland-like morphology, and a small amount of basophilic main cells were scattered in the glands (shown by arrow), ×400 (d)