. 2023 Dec 15;6(3):100983. doi: 10.1016/j.jhepr.2023.100983

Table 1.

Site and morphology codes used to define each cancer type.

Group name	Subgroup name	ICD10, topography code	ICD-O-2, morphology code
Cholangiocarcinoma overall	Intrahepatic cholangiocarcinoma	C221 (Intrahepatic bile duct carcinoma)	All morphologies
	Extrahepatic cholangiocarcinoma	C240 (Extrahepatic bile duct carcinoma)	All morphologies
	Cholangiocarcinoma other	C248 (Overlapping lesion of biliary tract), C249 (Biliary tract, unspecified)	All morphologies
	Cholangiocarcinoma other	C220, C222, C223, C224, C227, C229	8160
Ampulla of Vater		C241	All morphologies
Gallbladder		C23	All morphologies