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ICD-O-3 codes 

This table includes up-to-date International Classification of Diseases for Oncology (ICD-O-3) codes for haematological cancers and related precursor conditions. 

These codes take the format '1234/1' with the first four numbers representing the cell or tumour type and the final number representing the behaviour, ranging from 0 to 3. Behaviour codes are defined as: /0 for benign tumours, /1 for unspecified, borderline or uncertain behaviour, /2 for carcinoma in situ, /3 for malignant tumours. More information can be found in the WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues.