- Tumor histology and immunohistochemical studies:
- Tumor extension: Confined to intrahepatic bile ducts (carcinoma in situ / high-grade dysplasia) Confined to hepatic parenchyma Involves visceral peritoneal surface Directly invades gallbladder Directly invades adjacent structure(s) and organ(s) other than gallbladder (specify): Cannot be assessed No evidence of primary tumor
Fibrosis (specify scheme and scale, and extent) Cirrhosis Primary sclerosing cholangitis Biliary stones Chronic hepatitis (specify type):
- Other (specify):
- Additional notes: