# OnCo record cea-surveillance-colorectal (technology). 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/technologies/cea-surveillance-colorectal/>
  a schema:MedicalTherapy ;
  onco:kind "technology" ;
  schema:identifier "cea-surveillance-colorectal" ;
  schema:name "CEA surveillance after colorectal cancer surgery"@en ;
  schema:alternateName "carcinoembryonic antigen"@en, "CEA monitoring"@en, "CEA follow-up"@en, "colorectal cancer surveillance blood test"@en ;
  schema:description "Carcinoembryonic antigen is measured every few months for five years after bowel cancer surgery because a rising level often precedes visible recurrence; the trial that tested this found it catches more recurrences that can be operated on, though a survival benefit has not been shown."@en ;
  schema:url <https://onco.cc/technologies/cea-surveillance-colorectal/> ;
  schema:dateModified "2026-09-17"^^xsd:date ;
  schema:citation <https://doi.org/10.1001/jama.2013.285718> ;
  onco:status "standard-of-care" ;
  onco:cancers <https://onco.cc/cancers/colorectal/>, <https://onco.cc/cancers/small-bowel/>, <https://onco.cc/cancers/appendiceal/> ;
  onco:sections <https://onco.cc/fronts/diagnostics/> ;
  onco:technologies <https://onco.cc/technologies/serum-tumour-markers/>, <https://onco.cc/technologies/germ-cell-tumour-markers/>, <https://onco.cc/technologies/thyroid-cancer-markers/>, <https://onco.cc/technologies/mrd-testing/>, <https://onco.cc/technologies/liquid-biopsy/>, <https://onco.cc/technologies/ct/>, <https://onco.cc/technologies/colorectal-screening/> ;
  onco:targets <https://onco.cc/targets/ceacam5/> ;
  onco:drugs <https://onco.cc/drugs/signatera/>, <https://onco.cc/drugs/guardant-reveal/> ;
  onco:companies <https://onco.cc/companies/natera/>, <https://onco.cc/companies/guardant-health/> ;
  onco:terms <https://onco.cc/terms/tumour-marker/>, <https://onco.cc/terms/tumour-markers/>, <https://onco.cc/terms/ctdna/>, <https://onco.cc/terms/biomarker/> .