2B80.0

ICD-11 MMS 2026-01

Malignant neoplasms of duodenum

Description

A primary malignant neoplasm that affects the duodenum. Representative examples include carcinoma, lymphoma, and sarcoma.

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.

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

  • 2B80.00 – Adenocarcinoma of duodenum
  • 2B80.01 – Neuroendocrine neoplasm of duodenum
  • 2B80.0Y – Other specified malignant neoplasms of the duodenum
  • 2B80.0Z – Malignant neoplasms of duodenum, unspecified

Sibling codes

  • 2B80.1 – Malignant neoplasms of jejunum or ileum
  • 2B80.2 – Malignant neoplasms of small intestine, site unspecified
  • 2B80.Y – Other specified malignant neoplasms of small intestine
  • 2B80.Z – Malignant neoplasms of small intestine, unspecified

Foundation entity

Malignant neoplasms of duodenum – http://id.who.int/icd/entity/1527322574

Allowed postcoordination axes

Part of: 2B80: Malignant neoplasms of small intestine › 02: Neoplasms