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        Item #
        Length
        Source of Standard
        Year Implemented
        Version Implemented
        Year Retired
        Version Retired
    
    
        3831
        1
        NAACCR
        2018
        18
        
        
    



NAACCR XML: Tumor.extranodalExtensionHeadNeckClin




Description
Extranodal extension (ENE) is defined as "the extension of a nodal metastasis through the lymph node capsule into adjacent tissue" and is a prognostic factor for most head and neck tumors. This data item pertains to clinical staging extension.
Rationale
Extranodal Extension Head and Neck Clinical is a Registry Data Collection Variable in AJCC. It was previously collected as Head and Neck SSF# 8 (Common SSF).
Codes

    
        
            0
            Regional lymph nodes involved, ENE not present/not identified during diagnostic workup
        
        
            1
            Regional lymph nodes involved, ENE present/identified during diagnostic workup, based on physical exam WITH or WITHOUT imaging
        
        
            2
            Regional lymph nodes involved, ENE present/identified during diagnostic workup, based on microscopic confirmation
        
        
            4
            Regional lymph nodes involved, ENE present/identified, unknown how identified
        
        
            7
            No lymph node involvement during diagnostic workup (cN0)
        
        
            8
            Not applicable: Information not collected for this case

                (If this information is required by your standard setter, use of code 8 may result in an edit error)
            
        
        
            9
            Not documented in medical record

                ENE not assessed during diagnostic workup, or unknown if assessed

                Clinical assessment of lymph nodes not done, or unknown if done
            
        
        
            
        
    

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.

0	Regional lymph nodes involved, ENE not present/not identified during diagnostic workup
1	Regional lymph nodes involved, ENE present/identified during diagnostic workup, based on physical exam WITH or WITHOUT imaging
2	Regional lymph nodes involved, ENE present/identified during diagnostic workup, based on microscopic confirmation
4	Regional lymph nodes involved, ENE present/identified, unknown how identified
7	No lymph node involvement during diagnostic workup (cN0)
8	Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 8 may result in an edit error)
9	Not documented in medical record ENE not assessed during diagnostic workup, or unknown if assessed Clinical assessment of lymph nodes not done, or unknown if done