U.S. and Puerto Rico Data Variable Definitions
U.S. Cancer Statistics Public Use Database
The following variables are available in the U.S. Cancer Statistics Public Use Database, U.S. and Puerto Rico data (2005–2020). They are listed by SEER*Stat category. Click on the variable name for more information, including the source, description, and considerations for use.
Age at Diagnosis
Sex, Year of Diagnosis, and Registry
Site and Morphology
- Primary site – labeled
- Histologic type ICD-O-3 (International Classification of Diseases for Oncology, Third Edition)
- Behavior code ICD-O-3
- Grade
Restricted to diagnosis years 2005–2017 - Grade clinical
Restricted to diagnosis year 2018 or later - Grade pathological
Restricted to diagnosis year 2018 or later - Diagnostic confirmation
- ICD-O-3 histology/behavior, labeled
- Laterality
- Site recode ICD-O-3/WHO 2008
- International Classification of Childhood Cancer (ICCC) site recode ICD-O-3/WHO 2008
- ICCC site recode extended ICD-O-3/WHO 2008
- Adolescent and young adult (AYA) site recode 2020
- Lymphoid neoplasm recode 2021
Stage – Local, Regional, Distant (LRD) [Summary and Historic]
- Merged summary stage
Stage data are not available for testis cases.
Therapy
- Rx summary – surgery primary site
Restricted to female breast and diagnosis years 2010 or later
Extent of Disease
- CS site-specific factor 1 (WHO Grade Classification)
Restricted to brain and central nervous system and diagnosis years 2011 through 2017 - Merged estrogen receptor
Restricted to female breast and diagnosis years 2004 or later - Merged progesterone receptor
Restricted to female breast and diagnosis years 2004 or later - Merged HER2 summary
Restricted to female breast and diagnosis years 2010 or later