MEN1 and pancreatic neuroendocrine tumor: Pancreatic NETs (eg, gastrinomas, insulinomas and nonfunctioning tumors) occur in greater than 40% of patients with MEN1, and pituitary NETs (eg, prolactinomas, somatotrophinomas and corticotrophinomas) occur in greater than 35% of patients after the third decade of life (6, 7).