<prompt> Which is the most common site of gastrinoma in MEN 1 syndrome?JejunumIleumDuodenumStomach  <response>: ZOLLINGER ELLISON SYNDROMEGASTRINOMA 75 cases are sporadic, 25 are associated with MEN1 MC site - Duodenum Pancreas 1st pa 2nd pa 3rd pa 4th not Involved 90 of gastrinoma are present in Triangle of PassaroGastrinoma triangle MC symptom - Abdominal pain Treatment DOC - Proton pump inhibitors TOC - Pylorus preserving Whipples procedure 