The incidence of gastrinoma, which can cause<unk><unk>  syndrome, is approximately 0.05 - 0.2 per 100,000 individuals worldwide. About 25 to 30 percent of gastrinomas are caused by  multiple endocrine neoplasia type 1 (MEN1).
Zollinger-Ellison syndrome epidemiology and demographics
Mallory-Weiss syndrome epidemiology and demographics
Lactose intolerance epidemiology and demographics
Gastric dumping syndrome epidemiology and demographics
Barrett's esophagus epidemiology and demographics
Celiac disease epidemiology and demographics
Upper gastrointestinal bleeding epidemiology and demographics
Pyloric stenosis epidemiology and demographics