Intraductal papillary neoplasm of the bile duct accompanying biliary mixed adenoneuroendocrine carcinoma.

We present the first case of an intraductal papillary neoplasm of the bile duct (IPNB) accompanying a mixed adenoneuroendocrine carcinoma (MANEC). A 74-year-old woman presented with fever of unknown cause. Laboratory data revealed jaundice and liver injury.