2B54.1

ICD-11 MMS 2026-01

Undifferentiated pleomorphic sarcoma of retroperitoneum or 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.

Index terms

  • Undifferentiated pleomorphic sarcoma of retroperitoneum or peritoneum

Exclusions from above levels

  • 2A01.1 – Mesenchymal tumour of meninges
  • 2A02.1 – Tumours of cranial or paraspinal nerves
  • http://id.who.int/icd/entity/879154182 – Neoplasms of central nervous system or related structures
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  • http://id.who.int/icd/entity/944754984 – Neoplasms of haematopoietic or lymphoid tissues

Sibling codes

  • 2B54.0 – Undifferentiated pleomorphic sarcoma of skin
  • 2B54.Y – Undifferentiated pleomorphic sarcoma, other specified primary site
  • 2B54.Z – Undifferentiated pleomorphic sarcoma, unspecified primary site

Foundation entity

Undifferentiated pleomorphic sarcoma of retroperitoneum or peritoneum – http://id.who.int/icd/entity/986063444

Allowed postcoordination axes

Part of: 2B54: Undifferentiated pleomorphic sarcoma, primary site › 02: Neoplasms