{"entity":{"id":"idea-moon-population-germline-screening","kind":"idea","name":"Population germline screening for hereditary cancer genes with cascade testing","aka":[],"tldr":"Most people carrying a high-risk cancer gene do not know it until someone in the family gets cancer. Offer testing to all adults so carriers can be protected before that happens.","summary":"Family-history-based testing misses about half of BRCA and Lynch carriers. Population screening pilots (Ashkenazi BRCA programmes, Geisinger MyCode, Healthy Nevada) identify carriers efficiently and studies suggest cost-effectiveness at current sequencing prices. The proposal is national population screening for a defined panel of actionable hereditary cancer genes offered to all adults at a set age, with automated cascade testing offers to relatives, standardised risk-reducing pathways (enhanced surveillance, chemoprevention, risk-reducing surgery) and long-term outcome tracking.","asOf":"2026-09-08","links":[{"label":"Bottleneck evidence (Inherited risk is mostly unidentified): Childers et al., National estimates of genetic testing in women with breast or ovarian cancer (JCO 2017)","url":"https://doi.org/10.1200/JCO.2017.73.6314"}],"tags":[],"related":[],"cancers":["ovarian","colorectal","breast-hr-positive"],"sections":[],"technologies":["germline-testing","chemoprevention"],"targets":["brca"],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":["germline-vs-somatic"],"trials":[],"people":[],"bottlenecks":["b-hereditary-risk","b-prevention-adoption"],"keyPapers":["paper-childers-j-clin-oncol"],"journals":[],"dependsOn":[],"notes":[],"hypothesis":"Population screening identifies at least twice as many carriers as family-history testing and reduces incidence of advanced BRCA- and Lynch-associated cancers among carriers by half within a decade.","rationale":"Carrier identification followed by proven risk reduction prevents cancers rather than treating them, and sequencing cost is now trivial relative to a single cancer treatment.","test":"Regional programme with randomised age-cohort rollout; endpoints carrier detection rate, uptake of risk reduction and stage at diagnosis of hereditary cancers versus unscreened regions.","maturity":"being-tested-at-scale","actor":"policy","cost":"large","horizonYears":5},"route":"/ideas/idea-moon-population-germline-screening/","neighbours":{"cancer":[{"id":"colorectal","kind":"cancer","name":"Colorectal cancer","route":"/cancers/colorectal/"},{"id":"breast-hr-positive","kind":"cancer","name":"HR-positive / HER2-negative breast cancer","route":"/cancers/breast-hr-positive/"},{"id":"ovarian","kind":"cancer","name":"Ovarian cancer","route":"/cancers/ovarian/"}],"technology":[{"id":"chemoprevention","kind":"technology","name":"Chemoprevention & risk-reducing surgery","route":"/technologies/chemoprevention/"},{"id":"germline-testing","kind":"technology","name":"Germline (hereditary) testing","route":"/technologies/germline-testing/"}],"target":[{"id":"brca","kind":"target","name":"BRCA1 / BRCA2 (HRD)","route":"/targets/brca/"}],"term":[{"id":"germline-vs-somatic","kind":"term","name":"Germline vs somatic mutations","route":"/terms/germline-vs-somatic/"}],"bottleneck":[{"id":"b-hereditary-risk","kind":"bottleneck","name":"Inherited risk is mostly unidentified","route":"/bottlenecks/b-hereditary-risk/"},{"id":"b-prevention-adoption","kind":"bottleneck","name":"Prevention we already have is not deployed","route":"/bottlenecks/b-prevention-adoption/"}],"paper":[{"id":"paper-childers-j-clin-oncol","kind":"paper","name":"National Estimates of Genetic Testing in Women With a History of Breast or Ovarian Cancer","route":"/key-papers/paper-childers-j-clin-oncol/"},{"id":"paper-brca-risk-reducing-surgery-jama-2010","kind":"paper","name":"PROSE consortium: preventive surgery lowers cancer and death in BRCA1 and BRCA2 carriers","route":"/key-papers/paper-brca-risk-reducing-surgery-jama-2010/"}],"roadmap":[{"id":"prevention-roadmap","kind":"roadmap","name":"Cancer prevention roadmap: tobacco control and vaccines → biomarker-guided chemoprevention → interception in carriers","route":"/roadmaps/prevention-roadmap/"}]}}