More than half of islet cell tumors produce excessive gastrin, which stimulates the stomach to overproduce acid. (merckmanuals.com)
Caplan ER, Peterson ME, Mullen HS, Quesenberry KE, Rosenthal KL, Hoeffer HL, Moroff SD: Diagnosis and treatment of insulin - secreting pancreatic islet cell tumors in ferrets: 57 cases (1986 - 1994). (animalendocrine.com)
The remaining islet cell tumors may produce other hormones, such as vasoactive intestinal polypeptide, which can cause severe diarrhea and lead to dehydration. (merckmanuals.com)