VIPomas are rare functional neuroendocrine tumors characterized by the overproduction of vasoactive intestinal peptide (VIP), with an estimated incidence of 0.05 to 0.2 cases per million people per year, resulting in a distinct clinical syndrome often referred to as WDHA (watery diarrhea, hypokalemia, and achlorhydria). Here, VIP is linked to neuroendocrine neoplasm.