# OnCo record ccga-study (term). 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/terms/ccga-study/>
  a schema:DefinedTerm ;
  onco:kind "term" ;
  schema:identifier "ccga-study" ;
  schema:name "CCGA: the Circulating Cell-free Genome Atlas behind the Galleri methylation test"@en ;
  schema:alternateName "CCGA"@en, "CCGA3"@en, "Circulating Cell-free Genome Atlas"@en, "Galleri validation study"@en ;
  schema:description "CCGA is the case-control programme of about 15,000 people that trained and validated the Galleri blood test, which reads methylation patterns on cell-free DNA to say whether a cancer signal is present and where it comes from. Its third sub-study set the figures still quoted: very few false positives, but only about one in six stage I cancers detected."@en ;
  schema:url <https://onco.cc/terms/ccga-study/> ;
  schema:dateModified "2026-09-24"^^xsd:date ;
  schema:citation <https://doi.org/10.1016/j.annonc.2021.05.806> ;
  onco:tag "pancreatic-molecular" ;
  onco:cancers <https://onco.cc/cancers/pancreatic/> ;
  onco:technologies <https://onco.cc/technologies/mced/>, <https://onco.cc/technologies/cfdna-methylation-testing/>, <https://onco.cc/technologies/methylation-profiling/> ;
  onco:drugs <https://onco.cc/drugs/galleri/> ;
  onco:terms <https://onco.cc/terms/ppv/>, <https://onco.cc/terms/cfdna/>, <https://onco.cc/terms/stage-shift/>, <https://onco.cc/terms/detect-a-study/> ;
  onco:keyPapers <https://onco.cc/key-papers/paper-klein-ccga3-mced-validation-ann-oncol-2021/> .