We report a case of pancreatic tumour metastatic to the liver in a patient with insulin-treated diabetes, anaemia, cheilitis, necrolytic migratory erythema, hypokalemia and chronic watery diarrhea, a picture suggesting combined glucagonoma and VIPoma syndromes. Immunocytochemistry of a biopsied hepatic metastatic nodule revealed both glucagon and vasoactive intestinal peptide (VIP) positive cells. Increased plasma glucagon and VIP levels were detected (values of 900 pmol/l and 277 pmol/l respectively). This is the first reported case showing not only immunocytochemical, but also clinical evidence of the combined secretion of these hormones.