<prompt> All of the following are features of Zollinger-Ellison syndrome except:-Intractable peptic ulcersSevere diarrheaArise from beta cell tumors of pancreasVery high acid output  <response>: ZESaAKA Gastrinoma - arise from G- cells Gastrin producing cells Has increased gastrin production causing increased acid production- leads to peptic ulcer disease Causes of diarrhea: -Acid produced reaches duodenum and inactivate pancreatic enzymesworks only in alkaline ph causing Malabsorption -Acid reaches proximal jejunum and causes irritation- leads to jejunal secretion 