Villous adenoma of the duodenal papilla presenting as necrotizing pancreatitis in a patient with Gardner's syndrome.

The majority of patients with Gardner's syndrome and familial polyposis coli develop duodenal adenomatous polyps. Duodenal cancer sometimes arises in this setting, but nonmalignant problems from duodenal polyps have not been described. This report presents a patient with Gardner's syndrome who developed hemorrhagic pancreatitis and was found to have a villous adenoma encasing the pancreatic duct at the duodenal papilla. The case is important because it suggests that patients with polyposis coli may be at risk for significant nonmalignant problems from duodenal polyps, particularly if polyps exhibit villous histology and occur at the duodenal papilla.