A disease in which tumors cause the stomach to produce too much acid, resulting in peptic ulcers.
Zollinger-Ellison syndrome, or ZES, is caused by a gastrinoma, a neuroendocrine tumor that secretes a hormone called gastrin. The hormone causes excessive production of gastric acid, which leads to the growth of gastric mucosa and proliferation of parietal and ECL cells.
ZES may occur on its own or as part of an autosomal dominant syndrome called multiple endocrine neoplasia type 1 (MEN 1). The primary tumor is usually located in the pancreas, duodenum, or abdominal lymph nodes, but ectopic locations (e.g., heart, ovary, gallbladder, liver, and kidney) have also been described

Symptoms include:
- chronic diarrhea, including steatorrhea (fatty stools)
- pain in the esophagus, especially between and after meals at night
- nausea
- wheezing
- vomiting blood
- malnourishment
- loss of appetite

The syndrome was first described by the Norwegian doctor Roar Strøm in 1952. The syndrome was later described in 1955 by American surgeons Robert Zollinger and Edwin Ellison.

Adapted from Wikipedia, the free encyclopedia. Internet. Accessed on July 15, 2017.