Page History

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The structure of the ICD-O reference book contains three major sections:

Topography -

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A numerical list of anatomic sites adapted from the malignant neoplasms section of Chapter II of ICD-10. The topographic terms have 3-digit code numbers preceded by a "C" which run from C00.0 to C80.9.

Morphology -

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A numerical list of histologic terms that is a revised and expanded version of the morphology section of The Manual of Tumor Nomenclature and Coding. The ICD-O, 3rd edition includes new histologic types that have come into the literature since 1990. It has revised the Leukemia and Lymphoma sections and now includes several hematopoietic diseases that were previously considered borderline.

Alphabetic Index -

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A list of anatomic sites, histologic terms and selected tumor-like lesions and conditions.

Refer to the introductory pages of the International Classification of Diseases for Oncology, 3rd edition, for a more detailed discussion of the differences between ICD-O and ICD-10, as well as for rules governing the appropriate assignment of ICD-O codes. See also APPENDIX J for errata and clarifications to ICD-O-3rd edition.

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