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        Alternate Name
        Item#
        Length
        Source of Standard
        Column #
    
    
        Histology (CoC)
ICD-O-2 Histology (CCCR)
        420
        4
        SEER/CoC
        545-548
    



Description

Codes for the histologic type of the tumor being reported using ICD-O-2. NAACCR adopted ICD-O-2 as the standard coding system for tumors diagnosed in 1992 and later and recommended that prior cases be converted to ICD-O-2.



Note: See Histology (73-91) ICD-O-1 [1971] for ICD-O-1 and field trial codes.



Codes


    
        See ICD-O-2, Morphology Section.
    


Clarification of Required Status

This data item is required by all standard-setting organizations for tumors diagnosed from January 1, 1992, through December 31, 2000, and recommended for tumors diagnosed before 1992.



When the histologic type is coded according to ICD-O-2, the histology code must be reported in Histology (92-00) ICD-O-2 [420], with behavior coded in Behavior (92-00) ICD-O-2 [430].



For information on required status for related data items for histologic type and behavior when coded according to ICD-O-3, see Histologic Type ICD-O-3 [522] and Behavior Code ICD-O-3 [523].