{"entity":{"id":"idea-field-interception","kind":"idea","name":"Intercept cancer at the field stage","aka":[],"tldr":"Whole regions of tissue carry cancer mutations long before a tumour exists. Detecting and treating the field, not the tumour, could prevent cancers rather than cure them.","summary":"This idea proposes intercepting cancer at the field stage: tissue regions carry cancer mutations long before a tumour exists, so treating the field could prevent cancers rather than cure them. Mutant clones in normal oesophagus, skin and airway are pervasive, and Barrett's ablation, HPV vaccination and Lynch aspirin already show interception works when the field is identifiable (Field cancerisation pathway). The hypothesis is that field markers such as TP53-mutant clone burden in Barrett's oesophagus or bronchial brushings identify people for whom ablation or chemoprevention cuts cancer incidence. The test is a randomised trial of marker-guided ablation against surveillance in non-dysplastic Barrett's, relevant to Oesophageal cancer and Non-small-cell lung cancer.","asOf":"2026-09-08","links":[{"label":"Martincorena et al., High burden and pervasive positive selection of somatic mutations in normal human skin (Science 2015)","url":"https://doi.org/10.1126/science.aaa6806"}],"tags":["mechanism","open-question"],"related":[],"cancers":["esophageal","nsclc","head-and-neck"],"sections":[],"technologies":["precancer-ablation","chemoprevention","endoscopic-resection"],"targets":["tp53"],"drugs":[],"companies":[],"institutions":["cruk","francis-crick"],"pathways":["field-cancerisation","clonal-evolution"],"terms":["barretts-esophagus"],"trials":[],"people":[],"bottlenecks":[],"keyPapers":["paper-vogelstein-surfing-p53-network-nature-2000"],"journals":[],"dependsOn":[],"notes":[],"hypothesis":"Molecular field markers (e.g., TP53-mutant clone burden in Barrett's or bronchial brushings) identify individuals for whom ablation or chemoprevention reduces cancer incidence.","rationale":"Sanger normal-tissue sequencing; Cytosponge and nasal-brushing assays make field sampling minimally invasive.","test":"Randomised trial of field-marker-guided ablation versus standard surveillance in non-dysplastic Barrett's with high TP53 clone burden; endpoint progression to dysplasia/cancer.","maturity":"early-clinical"},"route":"/ideas/idea-field-interception/","neighbours":{"cancer":[{"id":"head-and-neck","kind":"cancer","name":"Head and neck squamous cell carcinoma","route":"/cancers/head-and-neck/"},{"id":"nsclc","kind":"cancer","name":"Non-small-cell lung cancer","route":"/cancers/nsclc/"},{"id":"esophageal","kind":"cancer","name":"Oesophageal cancer","route":"/cancers/esophageal/"}],"technology":[{"id":"chemoprevention","kind":"technology","name":"Chemoprevention & risk-reducing surgery","route":"/technologies/chemoprevention/"},{"id":"endoscopic-resection","kind":"technology","name":"Endoscopic resection (EMR / ESD)","route":"/technologies/endoscopic-resection/"},{"id":"precancer-ablation","kind":"technology","name":"Thermal ablation and cryotherapy for cervical precancer","route":"/technologies/precancer-ablation/"}],"target":[{"id":"tp53","kind":"target","name":"TP53","route":"/targets/tp53/"}],"institution":[{"id":"cruk","kind":"institution","name":"Cancer Research UK","route":"/institutions/cruk/"},{"id":"francis-crick","kind":"institution","name":"The Francis Crick Institute","route":"/institutions/francis-crick/"}],"pathway":[{"id":"clonal-evolution","kind":"pathway","name":"Clonal evolution & minimal residual disease","route":"/pathways/clonal-evolution/"},{"id":"field-cancerisation","kind":"pathway","name":"Field cancerisation","route":"/pathways/field-cancerisation/"}],"term":[{"id":"barretts-esophagus","kind":"term","name":"Barrett's oesophagus","route":"/terms/barretts-esophagus/"}],"paper":[{"id":"paper-martincorena-somatic-mutations-normal-skin-science-2015","kind":"paper","name":"Martincorena: normal sun-exposed skin is a patchwork of cancer-mutation clones","route":"/key-papers/paper-martincorena-somatic-mutations-normal-skin-science-2015/"},{"id":"paper-vogelstein-surfing-p53-network-nature-2000","kind":"paper","name":"Vogelstein, Lane and Levine 2000: surfing the p53 network","route":"/key-papers/paper-vogelstein-surfing-p53-network-nature-2000/"}]}}