NAACCR Item #774: EOD Regional Nodes

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Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired Column #
774 3 SEER 2018 16 921 - 923

NAACCR XML: Tumor.eodRegionalNodes

Alternate Names
   SEER Regional Nodes
EOD Regional Nodes is part of the EOD 2018 data collection system and is used to classify the regional lymph nodes involved with cancer at the time of diagnosis. See also EOD Primary Tumor [772] and EOD Mets [776]. Effective for cases diagnosed 1/1/2018+.
EOD Regional Nodes is used to calculate Derived EOD 2018 N [815] (when applicable) and Derived Summary Stage 2018 [762]. Derivation will occur at the level of the central registry.
Note: This data item was included in Standards Volume II, Version 16; however, it was not implemented until 2018.
Codes (in addition to valid schema-specific codes)
000 None
800 Regional lymph node(s), NOS
Lymph node(s), NOS
888 Not applicable–e.g., CNS, hematopoietic
999 Unknown
Note: See the most current version of EOD ( for rules and site-specific codes and coding structures.