2A61

ICD-11 MMS 2026-01

Acute leukaemias of ambiguous lineage

Description

An acute leukaemia in which the blasts lack sufficient evidence to classify as myeloid or lymphoid or they have morphologic and/or immunophenotypic characteristics of both myeloid and lymphoid cells.

Index terms

  • Acute leukaemias of ambiguous lineage
  • Mixed phenotype acute leukaemia with t(9;22) (q34;q11.2); BCR-ABL1
  • Mixed phenotype acute leukaemia with t(v;11q23); MLL rearranged
Show allHide
  • Mixed phenotype acute leukaemias, B and myeloid, not elsewhere classified
  • Mixed phenotype acute leukaemias, T and myeloid, not elsewhere classified

Exclusions from above levels

  • 2E03 – Malignant neoplasm metastasis in bone or bone marrow
  • http://id.who.int/icd/entity/501778925 – Malignant neoplasm metastasis in lymph nodes
  • http://id.who.int/icd/entity/97145147 – Malignant neoplasm metastasis in thymus gland

Sibling codes

  • 2A60 – Acute myeloid leukaemias and related precursor neoplasms
  • 2B30 – Hodgkin lymphoma
  • 2B31 – Histiocytic or dendritic cell neoplasms
  • 2B32 – Immunodeficiency-associated lymphoproliferative disorders
  • 2B33 – Malignant haematopoietic neoplasms without further specification
  • 2B3Z – Neoplasms of haematopoietic or lymphoid tissues, unspecified

Foundation entity

Acute leukaemias of ambiguous lineage – http://id.who.int/icd/entity/1062906118

Allowed postcoordination axes

Part of: 02: Neoplasms