You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Zollinger- Ellison syndrome is due to increased secretion of and explain in detail?
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