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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
DescriptionExtranodal 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.RationaleExtranodal 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).Codes0 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.