A tumor that causes overproduction of gastric acid. It usually occurs in the islet cells of the pancreas but may also occur in the esophagus, stomach, spleen, or lymph nodes.
A neoplasm that usually involves blood vessels and occurs in the pancreas or may be present in the wall of the duodenum. It produces excessive amounts of gastrin, which stimulates gastric acid secretion and consequent ulcer formation.
a gastrin-releasing islet cell tumour that is associated with Zollinger-Ellison syndrome