NAACCR Item #762: Derived Summary Stage 2018
|Item #||Length||Source of Standard||Year Implemented||Version Implemented||Year Retired||Version Retired|
NAACCR XML: Tumor.derivedSummaryStage2018
Derived Summary Stage 2018 is derived using the EOD data collection system (EOD Primary Tumor , EOD Regional Nodes  and EOD Mets ) algorithm. Other data items may be included in the derivation process. Effective for cases diagnosed 1/1/2018+.
The SEER program has collected staging information on cases since its inception in 1973. Summary Stage groups cases into broad categories of in situ, local, regional, and distant. Summary Stage can be used to evaluate disease spread at diagnosis, treatment patterns and outcomes over time.
Derived Summary Stage 2018  is only available at the central registry level.
Note: This data item was included in Standards Volume II, Version 16; however, it was not implemented until 2018.
|2||Regional, direct extension only|
|3||Regional, regional lymph nodes only|
|4||Regional, direct extension and regional lymph nodes|
|9||Unknown if extension or metastasis (unstaged, unknown, or unspecified) Death certificate only case|