Zollinger-Ellison syndrome (ZES) is a digestive disorder that occurs when tumors called gastrinomas form in the pancreas or duodenum (the first part of the small intestine). Gastrinomas are tumors ...

The diagnosis of ZES is established by demonstrating fasting hypergastrinemia and hyperacidity in patients suspected of the disease and confirmed by a positive secretion stimulation test when ...

The Zollinger-Ellison syndrome (ZES), characterized by severe peptic ulcer disease, gastric acid hypersecretion, and non-beta islet cell tumors of the pancreas, was first described in 1955.