IARC

The International Agency for Research on Cancer released an overview of the updated International Classification of Diseases for Oncology (ICD-O), a global standard used for cancer registration and research. The revised classification reflects advances in tumor characterization and improves consistency, data quality, and comparability across cancer registries. The update supports epidemiological research, health system planning, and evaluation of cancer control strategies by enabling more precise and interoperable cancer data collection.

ICD-O-4

The fourth edition (ICD-O-4) provides an improved structure of unique codes for existing and newly defined tumour entities and has been harmonized with the 11th revision of the International Classification of Diseases (ICD-11).

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