Abstract
The gastro-duodenal epithelial border was examined in 150 cases by means of retro-flexion in the bulb using small caliber panendoscope with an application of methylene blue spraying method. Results : 1) The borders were divided into two types, as follows : type I of which border located just on the pyloric ring, type II of which border located in the bulb far from the ring. The frequencies of these two types were 17.3% and 82.7% respectively. 2) The cases with closed type of atrophic border in the stomach showed dominantly type II (98.6%) but the cases with open type showed both type II (67.9%) and type I (32.1%). 3) The border showing type II was most commonly seen in the cases without intesti-nal metaplasia in the antrum, on the contrary in the cases with marked intestinal metaplasia, the frequency of type II was the same as type I. 4) The type of the border observed by endoscopy coincided with that of the resected tissue. 5) As for the distance between the gastro-duodenal epithelial border and the center of ulcer in 36 duodenal ulcers, it was revealed that the duodenal ulcer appeared closely to the border and 91.7% of them located within the distance of 10 mm from the border (average distance : 7.2 mm). 6) Finally, the cases with a pyloric ulcer seen in the bulb and an island of gastric epithelium observed among the duodenal epithelium near the gastro-duodenal epithelial border were presented.
