- Zollinger-Ellison syndrome is a rare disorder that occurs when one or more tumors form in the pancreas and duodenum. - Experts do not know the exact cause of Zollinger-Ellison syndrome. - About 25 to 30 percent of gastrinomas are caused by an inherited genetic disorder called multiple endocrine neoplasia type 1 (MEN1). - Although anyone can get Zollinger-Ellison syndrome, the disease is more common among men 30 to 50 years old. - Zollinger-Ellison syndrome signs and symptoms are similar to those of peptic ulcers. - Some people with Zollinger-Ellison syndrome have only diarrhea, with no other symptoms. Others develop gastroesophageal reflux (GER). - A health care provider diagnoses Zollinger-Ellison syndrome based on the following: - medical history - physical exam - signs and symptoms - blood tests - upper gastrointestinal (GI) endoscopy - imaging tests to look for gastrinomas - measurement of stomach acid - A health care provider treats Zollinger-Ellison syndrome with medications to reduce gastric acid secretion and with surgery to remove gastrinomas. A health care provider sometimes uses chemotherapymedications to shrink tumorswhen tumors are too widespread to remove with surgery. 
What to do for Zollinger-Ellison Syndrome ?