This edition of ICD-O, the standard tool for coding diagnoses of neoplasms in tumour and cancer registrars and in pathology laboratories, has been developed by a working party convened by the International Agency for Research on Cancer / WHO. ICD-O is a dual classification with coding systems for both topography and morphology. The book has five main sections. The first provides general instructions for using the coding systems and gives rules for their implementation in tumour registries and pathology laboratories. Section two includes the numerical list of topography codes, which remain unchanged from the previous edition. The numerical list of morphology codes is presented in the next section, which introduces several new terms and includes considerable revisions of the non-Hodgkin lymphoma and leukaemia sections, based on the WHO Classification of Hematopoietic and Lympoid Diseases. The five-digit morphology codes allow identification of a tumour or cell type by histology, behaviour, and grade. Revisions in the morphology section were made in consultation with a large number of experts and were finalised after field-testing in cancer registries around the world. The alphabetical index gives codes for both topography and morphology and includes selected tumour-like lesions and conditions. A guide to differences in morphology codes between the second and third editions is provided in the final section, which includes lists of all new code numbers, new terms and synonyms added to existing code definitions, terms that changed morphology code, terms for conditions now considered malignant, deleted terms, and terms that changed behaviour code.

"The International Classification of Diseases for Oncology" (ICD-O) has been used for nearly 25 years as the standard tool for coding diagnoses of neoplasms in tumor and cancer registrars and in pathology laboratories. ICD-O is a dual classification with coding systems for both topography and morphology. The topography code describes the site of origin of the neoplasm and uses the same 3-character and 4-character categories as in the neoplasm section of Chapter II, ICD-10. The morphology code describes the characteristics of the tumor itself, including its cell type and biologic activity.In preparing this revised edition, the editors have made a special effort to change as few terms as possible, to add new terms at empty spaces, and to avoid reuse of previously assigned codes. While all topography codes remain the same as in the previous edition, morphology codes have been thoroughly reviewed and, where necessary, revised to increase their diagnostic precision and prognostic value.

Sets out a revised international standard system for the classification of childhood cancer based on morphology. The 1996 edition has been revised to reflect changes in the second edition of the International Classification of Diseases for Oncology (ICD-O-2) and the Tenth Revision of the International Classification of Diseases (ICD-10) which introduced a new and expanded coding for cancer. The book opens with a general introduction to the new classification, emphasizing differences from previous classifications and the reasons why specific changes were introduced. This is followed by an explanation of the two, Child-check, computer programs, included with the book, for conversion from ICD-O-1 to ICD-O-2, and from ICD-O-2 to the current International Classification of Childhood Cancer (ICCC). The programs help users to improve the quality and comparability of childhood cancer data and to automate the scrutiny procedures as far as possible. Also provided are instructions for installing and running the programs, and a key to the content of output files. The main part of the book consists of a tabulation of the complete classification rules, followed by a conversion table for ICCC and the Birch and Marsden classification introduced in 1987. A series of tables indicating acceptable morphology and site combinations concludes the classification.