# OnCo record her3-expression (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/her3-expression/>
  a schema:MedicalTest ;
  onco:kind "biomarker" ;
  schema:identifier "her3-expression" ;
  schema:name "HER3 expression"@en ;
  schema:alternateName "HER3"@en, "ERBB3 expression"@en, "HER3-positive"@en, "HER3 IHC"@en ;
  schema:description "HER3 is a signalling partner of EGFR and HER2 present on most lung and breast cancers. Patritumab deruxtecan was studied in EGFR-mutant lung cancer without a HER3 threshold, and no approval exists."@en ;
  schema:url <https://onco.cc/biomarkers/her3-expression/> ;
  schema:dateModified "2026-09-23"^^xsd:date ;
  schema:citation <https://clinicaltrials.gov/study/NCT05338970> ;
  onco:tag "biomarker", "surface-antigen", "no-threshold" ;
  onco:related <https://onco.cc/biomarkers/egfr-exon-19-deletion/>, <https://onco.cc/biomarkers/her2-ihc-3-plus/> ;
  onco:cancers <https://onco.cc/cancers/nsclc/>, <https://onco.cc/cancers/breast-cancer/> ;
  onco:drugs <https://onco.cc/drugs/patritumab-deruxtecan/> .