2C51.Z

ICD-11 MMS 2026-01

Malignant neoplasms of peritoneum, unspecified

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

  • 2C50 – Malignant neoplasms of retroperitoneum
  • 2C52 – Malignant neoplasms of omentum
  • 2D91 – Malignant neoplasm metastasis in peritoneum
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  • 2E0Y – Abdominal carcinomatosis
  • http://id.who.int/icd/entity/1965082709 – Malignant mesenchymal neoplasms
  • 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

Sibling codes

  • 2C51.0 – Adenocarcinomas of peritoneum
  • 2C51.1 – Cystic, mucinous or serous carcinoma of peritoneum
  • 2C51.2 – Mesotheliomas of peritoneum
  • 2C51.Y – Other specified malignant neoplasms of peritoneum

Foundation entity

Malignant neoplasms of peritoneum – http://id.who.int/icd/entity/315445782

Allowed postcoordination axes

Part of: 2C51: Malignant neoplasms of peritoneum › 02: Neoplasms