Primary Adenocarcinoma of the Minor Duodenal Papilla Derived from Atypical Epithelium of the Accessory Pancreatic Duct—A Case Report—

Abstract

An 86-year-old-man, who visited another hospital because of anorexia, was diagnosed as having duodenal cancer based on upper gastrointestinal endoscopy and referred to our hospital. Subtotal stomach-preserving pancreaticoduodenectomy was performed, and the histopathological diagnosis was primary adenocarcinoma of the minor duodenal papilla (Stage IIA : Japanese Classification of Biliary Cancer 2013). Invasive tubular adenocarcinoma was mainly located in the minor duodenal papilla and invaded the pancreatic parenchyma. A non-invasive component was observed in the accessory pancreatic duct. The patient has been followed up after the operation for one and a half years, he has not developed recurrence, and he remains alive.