Schema Discriminator 1: BileDuctsDistal/BileDuctsPerihilar/CysticDuct

This input is used for staging


**Note:** A schema discriminator is used to discriminate for primary site C240 (extrahepatic bile ducts) for the subsite in which the tumor arose. * **00242 : Cystic Duct (see code 3)** Per the AJCC Gallbladder Staging System, the gallbladder tapers into the cystic duct * **00250: Bile Ducts Perihilar (see codes 1, 5, 6, 9)** Per the AJCC Perihilar Bile Ducts Staging System, perihilar (or proximal) cholangiocarcinomas involve the main biliary confluence of the right and left hepatic ducts and comprise 50-70% of all cases of bile ducts carcinomas * **00260: Bile Ducts Distal ( see codes 4, 7)** Per the AJCC Distal Bile Duct Staging System, these tumors have their center located between the confluence of the cystic duct and common hepatic duct and the Ampulla of Vater (excluding ampullary carcinomas.)




NAACCR #3926


Code Description Schema ID #/Description
1 Perihilar bile duct(s) Proximal extrahepatic bile duct(s) Hepatic duct(s) 00250: Bile Ducts Perhilar
3 Cystic bile duct; cystic duct 00242: Cystic Duct
4 Distal bile duct Common bile duct Common duct, NOS 00260: Bile Duct Distal
5 Diffuse involvement More than one subsite involved, subsite of origin not stated 00250: Bile Ducts Perhilar
6 Stated as middle extrahepatic bile duct AND treated with combined hepatic and hilar resection 00250: Bile Ducts Perhilar
7 Stated as middle extrahepatic bile duct AND treated with pancreaticoduodenectomy 00260: Bile Duct Distal
9 Extrahepatic bile ducts, NOS 00250: Bile Ducts Perhilar