A VIPoma (Pronounced "V I P oma") (also called Verner Morrison syndrome after the doctors who first noticed it[1]), is a tumor that does not happen a lot (1 per 10,000,000 per year) in the pancreas.[2] VIPoma makes something called vasoactive intestinal peptide, or VIP. It can do bad things to the heart, brain, gut, gallbladder, and more.