{"entity":{"id":"intrahepatic-cholangiocarcinoma-staging","kind":"term","name":"Intrahepatic bile duct cancer staging (AJCC chapter 23)","aka":["intrahepatic cholangiocarcinoma staging","intrahepatic bile duct cancer staging"],"tldr":"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).","asOf":"2026-11-04","links":[{"label":"National Cancer Institute, Bile duct cancer (cholangiocarcinoma) treatment (PDQ), health professional version: stage information","url":"https://www.cancer.gov/types/liver/hp/bile-duct-treatment-pdq"},{"label":"American College of Surgeons, AJCC Current Staging System 2026 (which chapters are 8th edition and which Version 9)","url":"https://www.facs.org/media/c5ik5tkr/ajcc-current-staging-system-2026.pdf"}],"tags":[],"related":["biliary-anatomy-subtypes","bismuth-corlette","tnm-staging"],"cancers":["intrahepatic-cholangiocarcinoma","cholangiocarcinoma"],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"category":"Clinical"},"route":"/terms/intrahepatic-cholangiocarcinoma-staging/","neighbours":{"term":[{"id":"bismuth-corlette","kind":"term","name":"Bismuth-Corlette classification (perihilar bile duct cancer)","route":"/terms/bismuth-corlette/"},{"id":"staging-systems","kind":"term","name":"Disease-specific staging and risk systems (FIGO, Ann Arbor, IPI, R-ISS, ELN, IMDC)","route":"/terms/staging-systems/"},{"id":"biliary-anatomy-subtypes","kind":"term","name":"Intrahepatic, perihilar, distal and gallbladder cancer","route":"/terms/biliary-anatomy-subtypes/"},{"id":"tnm-staging","kind":"term","name":"TNM staging","route":"/terms/tnm-staging/"}],"cancer":[{"id":"cholangiocarcinoma","kind":"cancer","name":"Biliary tract cancer (cholangiocarcinoma)","route":"/cancers/cholangiocarcinoma/"},{"id":"intrahepatic-cholangiocarcinoma","kind":"cancer","name":"Intrahepatic cholangiocarcinoma","route":"/cancers/intrahepatic-cholangiocarcinoma/"}]}}