2C51.2

ICD-11 MMS 2026-01

Mesotheliomas of peritoneum

Description

A malignant mesothelial neoplasm that arises from the peritoneum.

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

Child codes

2C51.20 – Mesothelioma of mesocolon
2C51.21 – Mesothelioma of mesentery
2C51.2Y – Mesotheliomas of other specified sites of peritoneum
2C51.2Z – Mesotheliomas of peritoneum, site unspecified

Sibling codes

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

Foundation entity

Mesotheliomas of peritoneum – http://id.who.int/icd/entity/1934564626

Allowed postcoordination axes

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