Zollinger- Ellison syndrome is due to increased secretion of
Gastrinoma (Zollinger-Ellison syndrome) is a condition that includes:Fulminating ulcer diathesis in the stomach, duodenum or atypical sites; Recurrent ulceration despite 'adequate' therapy; and Non-beta islet cell tumours of the pancreas (gastrinoma)Ref: Bailey and Love 27e pg: 850
Gastrin
Secretin
VIP
Cholecystokinin
Endocrinology and breast