Seasonal variations of inflammation and ulcer incidence as assessed by upper digestive tract endoscopy.

: A retrospective analysis of 3650 endoscopies shows that frequency of inflammation and ulcer incidence both in the stomach and the duodenal bulb were similar in consecutive seasons of the year. The conclusion is drawn that there may be seasonal (circannual) factors which predispose aggression to mucosa both in the stomach and duodenum, which in turn leads to seasonal occurrence of inflammation as well as to ulcer incidence.