Understanding SEER Staging API for Cancer Data Collection

SEER*RSA and SEER Staging API Nicki Schussler & Chuck May

Introduction Notes As mentioned! AJCC is updating their API New AJCC API will NOT include EOD 2018 SSDIs Summary Stage Grade All APIs discussed are available today in 2025 versions Some vendors are already interacting with Pediatric Data Collection System Technical questions? Nicki Schussler (SchusslerN@imsweb.com)

SEER Staging API SEER Staging API is a single API that supports the various staging algorithms EOD 2018 and Pediatric are currently used in data collection SEER intends to use the Staging API for any future staging needs Can be compared to different books within a library API calls would start with the following URLs (not usable as links; API key required) https://api.seer.cancer.gov/rest/staging/eod/latest/stage/ https://api.seer.cancer.gov/rest/staging/pediatric/latest/stage/ Once you understand one of these books (like Pediatric), you can use any of the other book within the Staging API

SEER*RSA EOD 2018 3.3 Content The SEER*RSA EOD 2018 v3.3 public will contain Schema selection based on Site, Histology and any relevant discriminators returns Schema ID Given a schema Lookups for EOD Primary Tumor[#772], EOD Regional Nodes[#774], EOD Mets[#776] (and EOD Prostate Pathologic Extension[#3919] Lookups for Summary Stage 2018[#764] Lookups for the related Site-Specific Data Items (SSDI) Lookups for Grades [#3843, 3844, 1068, 3845], Tumor Sizes [#752, 754, 756], and Neoadjuvant Therapy fields [#1632, 1633, 1634] Calculation of Derived EOD Stage Group based on EOD values Calculation of Derived Summary Stage 2018 [#762] based on EOD values

SEER*RSA Pediatric 1.3 Content The SEER*RSA Pediatric v1.3 (Pediatric Data Collection System PDCS) will contain Schema selection based on Site, Histology and any relevant discriminators (like Age Dx and Behavior) returns Pediatric ID Given a schema Lookups for Pediatric Primary Tumor[#1136], Pediatric Regional Nodes[#1137], Pediatric Mets[#1138] Lookups for the related Pediatric Site-Specific Data Items (SSDI) Calculation of Derived Pediatric T, N, M and Stage Group[#1142-1145] Calculation of derived Toronto T, N, M and Stage Group[#1146- 1149] for international data analysis

SEER Staging API Access The SEER Staging API provides the content for SEER*RSA SEER Staging API can also be accessed directly (data and functions) via REST API (SEER*API) Java library C# library Functionality of SEER Staging EOD and SEER Staging Pediatric are very similar If you plan to use SEER Staging API/libraries in 2026 Explore EOD 3.2 and/or Pediatric 1.2 AVAILABLE NOW! Get familiar with structure, data items, and function calls SEER Staging EOD 2018 has been in use for 6+ years

Relevant Websites SEER*API website, usage instructions and staging documentation https://api.seer.cancer.gov https://api.seer.cancer.gov/usage https://api.seer.cancer.gov/swagger-ui/index.html#/staging Java library and associated Wiki https://github.com/imsweb/staging-client-java https://github.com/imsweb/staging-client-java/wiki C# library and associated Wiki https://github.com/imsweb/staging-client-csharp https://github.com/imsweb/staging-client-csharp/wiki

Other Resources in SEER*API There are other resources within SEER*API See SEER API website for additional details (https://api.seer.cancer.gov/docs) Disease Database: searchable database of hematopoietic and lymphoid neoplasms and solid tumor diseases Glossary: glossary of cancer-related terms MPH: SEER implementation of the Multiple Primary and Histology Coding Rules; combines Hematopoietic rules, SEER Multiple Primary and Histology Coding Rules National Drug Code Directory: searchable mirror of the National Drug Code Directory from the FDA website (updated weekly) Additional oncologic information provided from CanMED SEER Rx - Antineoplastic Drugs Database: one-step lookup for coding oncology drug and regimen treatment categories in cancer registries (updated annually)

Other Resources in SEER*API cont Recode: recode variables are based on the primary site and histology data fields SEER Site Recode: defines the major cancer site/histology groups that are commonly used by SEER in the reporting of cancer incidence data International Classification of Childhood Cancer Site Recode: ICCC classification of childhood cancer is based on tumor morphology and primary site with an emphasis on morphology rather than the emphasis on primary site for adults Adolescents and Young Adults Site Recode: classification scheme for tumors of adolescents and young adults (AYA) developed to better define the major cancer sites that affect individuals between 15 and 39 years of age and to facilitate SEER's reporting of cancer incidence rates and trends Site specific surg code lookup: surgery tables for specific groups of sites for 1998 to the present

Closing Notes SEER*API documentation at https://api.seer.cancer.gov/docs Other specific links listed throughout the presentation Many resources, including Staging, can be found here SEER Staging API includes EOD 2018 includes Summary Stage 2018, Grades, SSDIs Pediatric includes PDCS and Pediatric SSDIs All APIs discussed are available today in 2025 versions EOD v3.2; PDCS v1.2 Technical questions? Nicki Schussler (SchusslerN@imsweb.com)