Corresponding Numbers in ICD-O-2
|Topographic regions and ill-defined sites||A||2|
|More than one topographic category or subcategory||C||4|
|Topography codes for lymphomas||D||12|
|Topography code for leukemias||E||13|
|Grading or differentiation||G||6|
|Compound morphology diagnoses||J||10|
|Coding multiple morphology terms||K||11|
*Notes: Second Edition rule 1 described the structure of the 10-digit code.
Second Edition rule 7 described the differences between the terms "cancer" and "carcinoma."
Second Edition rule 14 described the issues in coding multiple neoplasms.
There is no Rule I in the Third Edition to avoid possible confusion with a Rule 1.