2A00.4

ICD-11 MMS 2026-01

Astroblastoma of the brain

Description

A rare glial neoplasm more commonly found in young adults. It is characterised by tumour cells with characteristics suggestive of an astrocytic origin (positive for GFAP), arranged perivascularly. The cells have broad, non-tapering processes radiating towards a central blood vessel. The biologic behaviour of astroblastomas is variable, so no WHO grade has been established, yet.

Index terms

  • Astroblastoma of the brain
  • astroblastoma of unspecified site

Exclusions from above levels

  • 2D50 – Malignant neoplasm metastasis in brain
  • 2D51 – Malignant neoplasm metastasis in meninges
  • 2D52 – Malignant neoplasm metastasis in spinal cord, cranial nerves or paraspinal nerves

Sibling codes

  • 2A00.0 – Gliomas of brain
  • 2A00.1 – Embryonal tumours of brain
  • 2A00.2 – Tumours of neuroepithelial tissue of brain
  • 2A00.3 – Central neurocytoma of brain
  • 2A00.5 – Primary neoplasm of brain of unknown or unspecified type

Foundation entity

Astroblastoma of the brain – http://id.who.int/icd/entity/96344074

Allowed postcoordination axes

Part of: 2A00: Primary neoplasms of brain › 02: Neoplasms