Abstract
A 40-year-old man was reffered to our clinic with tarry stools. X-ray examination of the upper gastrointestinal tract revealed a polypoid lesion (Yamada III shaped), 12mm in diarneter, located on the greater curvature of the fornix. Endoscopically, this polypoid lesion showed well defined boundaries, which was whitish in color with smooth surface and without erosion or ulceration. Histologically, the lesion mimicking foveolar epithelium was a very well differentiated-type of early carcinoma arising from the fundic gland mucosa. As a result, we concluded that this lesion was adenocarcinoma of gastric type (foveolar type) because of containing GOS positive cancer cells by mucin histochemical staining.
