Appendix: Coding of cancer diagnoses: coding systems used by registries and pathology review

Coding system	Registry
ICD-8^6-150	Office for National Statistics, Northern Region Cancer Bureau, North Western Regional Cancer Registry: during 1968–78
ICD-9^6-150	Office for National Statistics, Northern Region Cancer Bureau, North Western Regional Cancer Registry: from 1979
ICD-O-1^6-151	Manchester Children's Tumour Registry
ICD-O-1^6-151	National Registry of Childhood Tumours
ICD-O-1^6-151	Northern Region Young Persons' Malignant Disease Registry
SNOMED^6-152	Pathology review—solid tumours
ICD-O-2^6-151	Pathology review—leukaemias

↵6-150 ICD-8, ICD-9 Eighth (1967) and Ninth (1977) Revisions of International Classification of Diseases. WHO.
↵6-151 ICD-O-1, ICD-O-2 International Classification of Diseases for Oncology, editions 1 (1976) and 2 (1990). WHO.
↵6-152 SNOMED Systematized Nomenclature of Medicine, 2nd ed (1976). College of American Pathologists.