<prompt> Most common functional neuroendocrine tumor of pancreas in MEN1:GlucagonomaGastrinomaVIPomaSomatostatinoma  <response>: NEURO ENDOCRINE TUMORS NET OF PANCREAS Mc Neuroendocrine tumor NET: Non- functional PPoma Mc functional Neuroendocrine tumor: Insulinoma Mc functional malignant NET in MEN 1: Gastrinoma. MC Functional Enteropancreatic NET in MEN 1 - Gastrinoma Insulinoma SRS- Somatostatin receptor scintigraphy- IOC for All of the neuroendocrine tumors except Insulinoma 