Pancreatic insufficiency: Impaired pancreatic functioning. The pancreas does not produce sufficient digestive enzymes to properly digest lipids and proteins. Pancreatic insufficiency may be caused by such things as pancreatic cancer, cystic fibrosis, pancreatic resection and chronic pancreatitis.
Zollinger-Ellison syndrome: A rare disorder where excessive levels of the hormone gastrin are released into the stomach which increases stomach acidity which results in peptic ulcer development. A hormone secreting pancreatic or duodenal tumor is usually the cause.