Merged estrogen receptor
Source of standard: CDC’s National Program of Cancer Registries
Source item name: Combined from CS Site-Specific Factor 1 (breast) and Estrogen Receptor Summary
This is a merged variable created using the variables CS Site-Specific Factor 1 (breast) and Estrogen Receptor Summary and is the summary of results of the estrogen receptor (ER) assay.
Considerations for Use
Data for this variable are available for female breast cancer cases diagnosed in 2004 or later.
Brain and Other Nervous System Sites
Note: This frequency table is restricted to female breast cancer cases and diagnosis years 2004 or later.
Note: This frequency table is restricted to central nervous system cases and diagnosis years ≥2011.