2A37

ICD-11 MMS 2026-01

Myelodysplastic syndrome, unclassifiable

Description

A subtype of myelodysplastic syndrome which at disease presentation lacks findings appropriate for classification into any other MDS category, or has an MDS-associated cytogenetic abnormality and cytopenia, but lack sufficient dysplastic changes in any lineage and have <15% ring sideroblasts.

Index terms

  • Myelodysplastic syndrome, unclassifiable

Exclusions from above levels

  • 2A60.2 – Therapy-related myeloid neoplasms
  • 3A70.10 – Drug-induced aplastic anaemia
  • 2E03 – Malignant neoplasm metastasis in bone or bone marrow
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  • 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

  • 2A30 – Refractory anaemia
  • 2A31 – Refractory neutropaenia
  • 2A32 – Refractory thrombocytopenia
  • 2A33 – Refractory anaemia with ring sideroblasts
  • 2A34 – Refractory cytopenia with multi-lineage dysplasia
  • 2A35 – Refractory anaemia with excess of blasts
  • 2A36 – Myelodysplastic syndrome with isolated del(5q)
  • 2A38 – Refractory cytopenia of childhood
  • 2A3Y – Other specified myelodysplastic syndromes
  • 2A3Z – Myelodysplastic syndromes, unspecified

Foundation entity

Myelodysplastic syndrome, unclassifiable – http://id.who.int/icd/entity/1684468291

Allowed postcoordination axes

Part of: 02: Neoplasms