Primary hepatic vipoma

A 35-yr-old male presented with a 3-yr history of voluminous watery diarrhea. He had episodes of severe generalized weakness which responded to fluid and electrolyte replacement therapy. Investigations revealed a solitary liver mass and an elevated vasoactive intestinal polypeptide level. An extensive work-up did not show any other extrahepatic primary lesion. Surgical resection ameliorated all of his symptoms, accompanied by a decrease in the vasoactive intestinal polypeptide level. We believe that this patient represents a case of primary hepatic vipoma syndrome. To our present knowledge, this has not been reported previously. We discuss the clinical manifestations, investigations, and management of the case.