# AJCC Version 9 staging

Source: https://onco.cc/terms/ajcc-version-9/  
OnCo record `ajcc-version-9` (Term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

The American Joint Committee on Cancer now updates its staging one cancer at a time as Version 9 protocols, so a report may use the 8th edition for one cancer and Version 9 for another.

## Summary

The AJCC moved from printed editions to versions. Its 2026 table of the current staging system lists which of the 8th edition's chapters have been replaced by a Version 9 protocol and when: appendix carcinoma, anus and brain and spinal cord (2023); the six neuroendocrine tumour sites (stomach, duodenum and ampulla, jejunum and ileum, appendix, colon and rectum, pancreas) and vulva (2024); nasopharynx, thymus, lung and diffuse pleural mesothelioma (2025); salivary glands and HPV-associated oropharynx (2026); and cervix uteri (2021). Every other site still uses its 8th edition chapter.

## Fields

- Kind: Term
- Last checked: 2026-11-04
- Also known as: AJCC Version 9; AJCC v9; AJCC 9th; Version 9 protocol

## Sources

- 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
- American College of Surgeons, AJCC Version 9 cancer staging systems: https://www.facs.org/quality-programs/cancer-programs/american-joint-committee-on-cancer/version-9/

## Connected records

- terms: [AJCC stage (TNM staging manual)](https://onco.cc/terms/ajcc-stage/), [Anal cancer staging (AJCC chapter 21)](https://onco.cc/terms/anus-staging/), [Disease-specific staging and risk systems (FIGO, Ann Arbor, IPI, R-ISS, ELN, IMDC)](https://onco.cc/terms/staging-systems/), [FIGO 2021 staging of vulvar cancer](https://onco.cc/terms/figo-2021-vulva/), [HPV-associated oropharyngeal cancer staging (AJCC chapter 10)](https://onco.cc/terms/hpv-oropharynx-staging/), [Nasopharyngeal cancer staging (AJCC chapter 9)](https://onco.cc/terms/nasopharynx-staging/), [Pancreatic neuroendocrine tumour staging (AJCC chapter 34)](https://onco.cc/terms/net-pancreas-staging/), [Pleural mesothelioma staging (AJCC chapter 37)](https://onco.cc/terms/pleural-mesothelioma-staging/), [Thymic tumour staging (Masaoka-Koga and AJCC chapter 35)](https://onco.cc/terms/thymus-staging/), [TNM 9: what changed in lung cancer staging](https://onco.cc/terms/tnm-9-lung-cancer/), [TNM staging](https://onco.cc/terms/tnm-staging/)

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