# Pancreatic neuroendocrine tumour staging (AJCC chapter 34)

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

## TL;DR

Pancreatic neuroendocrine tumours have their own TNM staging, separate from ordinary pancreatic cancer, in which small tumours confined to the pancreas are stage I.

## Summary

AJCC chapter 34 covers neuroendocrine tumours of the pancreas; the AJCC 2026 table lists a Version 9 protocol for 2024, one of six neuroendocrine sites updated that year. In the 8th edition tables reproduced by the NCI, stage I is a tumour limited to the pancreas and smaller than 2 cm with no node or distant spread; stage II is a tumour limited to the pancreas of 2 to 4 cm, or larger than 4 cm or invading the duodenum or bile duct, without spread. Grade by Ki-67 is reported separately and matters as much for treatment.

## Fields

- Kind: Term
- Last checked: 2026-11-04
- Also known as: pancreatic NET staging; pancreatic neuroendocrine tumour staging

## Sources

- National Cancer Institute, Pancreatic neuroendocrine tumors (islet cell tumors) treatment (PDQ), health professional version: stage information: https://www.cancer.gov/types/pancreatic/hp/pnet-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: [AJCC Version 9 staging](https://onco.cc/terms/ajcc-version-9/), [Disease-specific staging and risk systems (FIGO, Ann Arbor, IPI, R-ISS, ELN, IMDC)](https://onco.cc/terms/staging-systems/), [Neuroendocrine tumour grade (Ki-67) and WHO classification](https://onco.cc/terms/net-grade-ki67/), [TNM staging](https://onco.cc/terms/tnm-staging/)
- cancers: [Pancreatic neuroendocrine tumours](https://onco.cc/cancers/pancreatic-net/)

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