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        Item #
        Length
        Source of Standard
        Year Implemented
        Version Implemented
        Year Retired
        Version Retired
        Column #
    
    
        446
        2
        SEER
        2006
        11
        
        
        603 - 604
    



NAACCR XML: Tumor.multiplicityCounter




Description
This data item is used to count the number of tumors (multiplicity) that are reported as a single primary, when present at the time of diagnosis or occurring later.
Rationale
Patients with multiple tumors reported as a single primary for surveillance purposes may have a worse prognosis or more extensive treatment than patients with a single tumor. This data item will make it possible to identify important information about these cases for data analysis.
Codes (refer to
    http://seer.cancer.gov/tools/mphrules/index.html for additional instructions).

    
        
            00
            No primary tumor identified
        
        
            01
            One tumor only
        
        
            02
            Two tumors present; bilateral ovaries involved with cystic carcinoma
        
        
            03
            Three tumors present
        
        
            ..
        
        
            ..
        
        
            88
            Information on multiple tumors not collected/not applicable for this site
        
        
            89
            Multicentric, multifocal, number unknown
        
        
            99
            Unknown if multiple tumors; not documented
        
        
            Blank
            Information not collected for this diagnosis date (e.g., all cases diagnosed prior to 2007)
        
        
            
            
        
    

Note: Codes 00 and 89 were added effective for 2011.

00	No primary tumor identified
01	One tumor only
02	Two tumors present; bilateral ovaries involved with cystic carcinoma
03	Three tumors present
..
..
88	Information on multiple tumors not collected/not applicable for this site
89	Multicentric, multifocal, number unknown
99	Unknown if multiple tumors; not documented
Blank	Information not collected for this diagnosis date (e.g., all cases diagnosed prior to 2007)