[Coding of tumorous lesions in anatomopathology]

The writer presents an initial and brief analysis of the "International Classification of Diseases, adaptation to Oncology "(CIM-O), prepared by the World Health Organization based on the 9th revision of the International Classification of Diseases. The CIM-O includes a topographical code (location of tumors) and a morphological code (histopathology of tumors) and thus makes available to all specialists in carcinology, including anatomopathologists, an international work tool for the recording of their findings. The English edition of the CIM-O has just been published, and its version in French is in the progress of preparation. The CIM-O should become effective internationally on 1 January, 1979.