2C27

ICD-11 MMS 2026-01

Malignant neoplasms of thymus

Description

Primary malignant neoplasm involving the thymus. This category includes malignant thymomas, primary thymic carcinomas and carcinoid tumour or other neuroendocrine neoplasms of thymus.

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.

Excludes

  • 2E0Y – Malignant neoplasm metastasis in thymus gland
  • http://id.who.int/icd/entity/1965082709 – Malignant mesenchymal neoplasms

Exclusions from above levels

  • 2C51.2 – Mesotheliomas of peritoneum
  • 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

  • 2C27.0 – Carcinoma of thymus
  • 2C27.1 – Carcinoid tumour or other neuroendocrine neoplasms of thymus
  • 2C27.2 – Thymoma
  • 2C27.Y – Other specified malignant neoplasms of thymus
  • 2C27.Z – Malignant neoplasms of thymus, unspecified

Sibling codes

  • 2C20 – Malignant neoplasms of nasal cavity
  • 2C21 – Malignant neoplasms of middle ear
  • 2C22 – Malignant neoplasms of accessory sinuses
  • 2C23 – Malignant neoplasms of larynx
  • 2C24 – Malignant neoplasms of trachea
  • 2C25 – Malignant neoplasms of bronchus or lung
  • 2C26 – Malignant neoplasms of the pleura
  • 2C28 – Malignant neoplasms of heart or mediastinum
  • 2C29 – Malignant neoplasms of other or ill-defined sites in the respiratory system or intrathoracic organs

Foundation entity

Malignant neoplasms of thymus – http://id.who.int/icd/entity/1718833206

Allowed postcoordination axes

Part of: 02: Neoplasms