<prompt> All of the following are true about gastrinoma except:Mostly found in triangle of PassaroBasal acid output 15 mEqhour is diagnosticMost common site is pancreasLymphadenectomy is not required as there is no improvement in survival  <response>: Gastrinoma OR Zollinger-Ellison syndrome ZES Increased gastrin, increased acid, increased risk of peptic ulcer disease. Triangle of Passaro Gastrinoma Triangle. M.C site of gastrinoma is duodenum 1st, 2nd 3rd pancreas Gastrinoma is associated with MEN-1 syndrome. Diagnosis Basal acid output 15 mEq hour Best provocative test - Secretin Stimulation Test gastrin release 200Pg ml IOC for localization - Somatostatin Receptor Scintigraphy Drug of choice - PPI Treatment of choice: pylorus preserving pancreatoduodenectomy 