Intraductal neoplasms of the bile ducts

The intraductal neoplasms of the bile ducts are divided into those lesions that are a precursor to adenocarcinoma of the bile ducts, also referred to as preinvasive lesions, and the invasive tumors, which are cholangiocarcinomas of intraductal growing type.

• preinvasive 
  • biliary intraepithelial neoplasia (BilIN)
  • intraductal papillary neoplasm of the bile duct (IPNB) 
    • its diffuse form was formerly known as "biliary papillomatosis"
  • intraductal tubulopapillary neoplasm (ITPN) of the bile duct
  • mucinous cystic neoplasm
• invasive
  • cholangiocarcinomas - intraductal growing type