# Intrahepatic bile duct cancer staging (AJCC chapter 23)

Source: https://onco.cc/terms/intrahepatic-cholangiocarcinoma-staging/  
OnCo record `intrahepatic-cholangiocarcinoma-staging` (Term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Bile duct cancer inside the liver is staged by the number of tumours, their size (5 cm is the cut-off) and whether they invade blood vessels, then by spread to nodes and distant organs.

## Summary

AJCC chapter 23 covers the intrahepatic bile ducts and is an 8th edition chapter in the AJCC 2026 table. In the 8th edition tables reproduced by the NCI, stage 0 is carcinoma in situ inside the duct; stage IA is a single tumour of 5 cm or less without vascular invasion and IB a single tumour larger than 5 cm without it; stage II is a single tumour with vascular invasion inside the liver, or several tumours. Perihilar and distal bile duct cancers have their own chapters (25 and 26).

## Fields

- Kind: Term
- Last checked: 2026-11-04
- Also known as: intrahepatic cholangiocarcinoma staging; intrahepatic bile duct cancer staging

## Sources

- National Cancer Institute, Bile duct cancer (cholangiocarcinoma) treatment (PDQ), health professional version: stage information: https://www.cancer.gov/types/liver/hp/bile-duct-treatment-pdq
- American College of Surgeons, AJCC Current Staging System 2026 (which chapters are 8th edition and which Version 9): https://www.facs.org/media/c5ik5tkr/ajcc-current-staging-system-2026.pdf

## Connected records

- terms: [Bismuth-Corlette classification (perihilar bile duct cancer)](https://onco.cc/terms/bismuth-corlette/), [Disease-specific staging and risk systems (FIGO, Ann Arbor, IPI, R-ISS, ELN, IMDC)](https://onco.cc/terms/staging-systems/), [Intrahepatic, perihilar, distal and gallbladder cancer](https://onco.cc/terms/biliary-anatomy-subtypes/), [TNM staging](https://onco.cc/terms/tnm-staging/)
- cancers: [Biliary tract cancer (cholangiocarcinoma)](https://onco.cc/cancers/cholangiocarcinoma/), [Intrahepatic cholangiocarcinoma](https://onco.cc/cancers/intrahepatic-cholangiocarcinoma/)

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