# OnCo record er-status (biomarker). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)". Whole corpus: https://onco.cc/api/v1/onco.nt
@prefix schema: <https://schema.org/> .
@prefix onco: <https://onco.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://onco.cc/biomarkers/er-status/>
  a schema:MedicalTest ;
  onco:kind "biomarker" ;
  schema:identifier "er-status" ;
  schema:name "ER status (oestrogen receptor by IHC)"@en ;
  schema:alternateName "ER status"@en, "ER-positive"@en, "ER positive"@en, "ER+"@en, "ER-negative"@en, "estrogen receptor status"@en, "oestrogen receptor status"@en, "ER low positive"@en, "ER >= 1%"@en, "ER 1-10%"@en ;
  schema:description "ER status is whether the tumour's cells carry the oestrogen receptor, read by staining nuclei. One percent or more of stained nuclei is positive and means hormone-blocking treatment can work; 1 to 10 percent is 'low positive' and behaves more like negative."@en ;
  schema:url <https://onco.cc/biomarkers/er-status/> ;
  schema:dateModified "2026-09-23"^^xsd:date ;
  schema:citation <https://doi.org/10.1200/JCO.19.02309> ;
  onco:tag "biomarker", "hormone-receptor" ;
  onco:related <https://onco.cc/biomarkers/pr-status/>, <https://onco.cc/biomarkers/ki-67-index/>, <https://onco.cc/biomarkers/esr1-mutation-ctdna/> ;
  onco:cancers <https://onco.cc/cancers/breast-hr-positive/>, <https://onco.cc/cancers/breast-cancer/>, <https://onco.cc/cancers/hr-positive-early-high-risk/>, <https://onco.cc/cancers/hr-positive-metastatic-post-cdk46/>, <https://onco.cc/cancers/endometrial/> ;
  onco:drugs <https://onco.cc/drugs/tamoxifen/>, <https://onco.cc/drugs/letrozole/>, <https://onco.cc/drugs/fulvestrant/>, <https://onco.cc/drugs/palbociclib/>, <https://onco.cc/drugs/ribociclib/>, <https://onco.cc/drugs/abemaciclib/>, <https://onco.cc/drugs/elacestrant/>, <https://onco.cc/drugs/alpelisib/>, <https://onco.cc/drugs/capivasertib/> ;
  onco:terms <https://onco.cc/terms/hormone-receptor-status/>, <https://onco.cc/terms/ihc/>, <https://onco.cc/terms/serd/> .