gastrointestinal disorders
Vipoma
Introduction
A vipoma is a non-beta pancreatic islet cell tumor secreting vasoactive intestinal peptide (VIP), resulting in a syndrome of watery diarrhea, hypokalemia, and achlorhydria (WDHA syndrome). Diagnosis is by serum VIP levels. Tumor is localized with CT and endoscopic ultrasound. Treatment is surgical resection. Vipomas are a type of Overview of Pancreatic Endocrine Tumors that arises from islet cells. Of these tumors, more than half are malignant, and some may be quite large (7 cm) at diagnosis. In about 6% of patients, vipoma occurs as part of 