2B81.0

ICD-11 MMS 2026-01

Adenocarcinoma of appendix

Description

A malignant neoplasm arising from the glandular epithelium of the appendix. Most are mucinous adenocarcinomas.

Coding note from above levels

For use of this category, reference should be made to the mortality coding rules and guidelines in the Reference Guide.

Index terms

  • Adenocarcinoma of appendix

Exclusions from above levels

  • http://id.who.int/icd/entity/1965082709 – Malignant mesenchymal neoplasms
  • http://id.who.int/icd/entity/111033337 – Malignant neoplasm metastasis in digestive system
  • http://id.who.int/icd/entity/794095161 – Malignant neoplasms of lip, oral cavity or pharynx
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  • http://id.who.int/icd/entity/879154182 – Neoplasms of central nervous system or related structures
  • http://id.who.int/icd/entity/944754984 – Neoplasms of haematopoietic or lymphoid tissues

Child codes

  • 2B81.00 – Mucinous adenocarcinoma of appendix

Sibling codes

  • 2B81.2 – Neuroendocrine neoplasms of appendix
  • 2B81.Y – Other specified malignant neoplasms of appendix
  • 2B81.Z – Malignant neoplasms of appendix, unspecified

Foundation entity

Adenocarcinoma of appendix – http://id.who.int/icd/entity/1696330825

Allowed postcoordination axes

Part of: 2B81: Malignant neoplasms of appendix › 02: Neoplasms