Abstract
It has been thought that an excessive reflux of duodenal contents from the duodenum to the stomach due to an abnormal pyloric function plays an improtant role in the formation of a gastric ulcer. In this paper, the correlation of associated gastric ulcer with a deformity of the duodenal bulb or the pyloric ring was studied in patients with a duodenal ulcer. The incidence of associated gastric ulcers or scars was three times or more higher in patients with marked deformity of the duodenal bulb and pyloric ring than in patients with out them. Associated gastric lesions were many more in the antrum. compaired with controls. These results may imply that the deformity of the pyloric ring impair the protective mechanism against duodenogastric reflux, and that the increased ref ulx of the duodenal juice causes a gastric ulcer.
