FIELD E ; 

 Columns 1! 

 22, 23, 



Tumor Code 

 , 19, 20, 21, 

 24, and 25 



CODING OF TUMORS 



GENERAL DISCUSSION OF THE CBCC TUMOR CODE 



1. Information about a specific tumor 



Tumor symbols are derived by a coding pattern different from that for other pathologies. The 

 list of tumors, with the symbols which represent coded information identifying the tumors, is therefore 

 a separate and distinct list and is designated as the CBCC Tumor Code. 



This description of the Tumor Code is essentially concerned with the pattern for coding, within 

 Field E, information about the tumors themselves. The coding of information about a given tumor 

 results in a combination of symbols in IBM Columns 18-25, which collectively represent the total, 

 fixed symbol for the tumor. The section of the Key giving specific directions for using in Field E that 

 prepared symbol for a tumor, when coding information about chemical tests , is included in the 

 preceding General Discussion of Field E. 



In coding identifying information about tumors, Field E is divided into five sub-areas for five 

 specific categories of information about each tumor, just as, in the case of the Taxonomy Code, Field 

 E is divided into six sub-areas for description of phylum, class, order, family, genus, and species. 

 The diagram below illustrates, for tumor coding, the distribution of the eight IBM punched card 

 columns (1-8, in the diagram) among the five sub-areas of Field E (I-V) and indicates the category of 

 tumor information coded in each sub-area. The paragraphs that follow explain in turn each of the five 

 parts. For consistency, the five sub-areas are referred to hereafter as "parts" of the total 8-"unit" 

 tumor symbol. 



7 



Tumor. 

 I 



Organ 



origin . 

 II 



Tissue 

 origin. 



Ill 



Description (Parts 

 II-V) of the tumor 

 (Part I). 



Combination of Parts II 

 and III: Organ-tissue 

 origin of the tumor. 



Modifier 

 of the 

 organ- 

 tissue 

 o rigin . 

 IV 



Specific 

 tumor 

 de signat ion. 

 V 



Tumor type, when not adequately 

 distinguished by Part III (or by 

 Part II, or by III and II combined.) 



I 



Symbol for a specific tumor made by 

 attaching Part V to the organ-tissue 

 site (Parts II, III, and IV, combined.) 



31 



