FIELD E 



Columns 18, 19, 20, 21, 



22, 23, 24, and 25 



ORGANISM OR PATHOLOGICAL CONDITION 

 ACTED ON BY THE TEST COMPOUND 



Field E is for the entry of one of the following: 



I (1) TEST ORGANISM ACTED ON BY THE TEST COMPOUND 



(2) TUMOR ACTED ON BY THE TEST COMPOUND 



(3) PATHOLOGICAL CONDITION OTHER THAN TUMOR 



ACTED ON BY THE TEST COMPOUND 



II (4) TUMOR PRODUCED BY THE TEST COMPOUND 



The section of the Code designated as Field E is divided into three major parts. The first is 

 the Taxonomy Code, listing all the phyla, classes, orders, families, genera, and species for which 

 the CBCC has already assigned code symbols. 



Following the Taxonomy Code lists, the second part of Field E is the Tumor Code, listing all 

 types of tumors and specific tumors for which the CBCC has already assigned code symbols. Appended 

 at the end of this Tumor Code section is a special list of anatomical items to be used only for inter- 

 preting the second and third units of the tumor symbols (Columns 19 and 20); the list is used by the 

 Center for constructing unique symbols for tumors added to the existing list. 



Finally, the third part of Field E is the Pathology Code, listing the pathologies for which the 

 CBCC has assigned code symbols and designated specific coding involving Fields H and T as well as 

 Field E. Appended at the end of this list of pathologies are lists of etiologies classified and assigned 

 code symbols to be used in interpreting the 5th and 6th units of the pathology symbol (Columns 22 and 

 23) and used by the Center in constructing unique symbols for pathologies added to the existing list. 



It will be understood that the CBCC coding procedure permits Field E to be coded with only a 

 single entry in any one code line, an organism, a tumor of an organism, or a pathology of an organism, 

 whichever the chemical was tested to affect. Therefore, for any one code line, only one of the three 

 separate Field E codes will be consulted. 



The general use of the field is discussed in the Key, prior to the three special sections explain- 

 ing the organization of each of the Taxonomy, Tumor, and Pathology Codes. 



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