The Liquid Biopsy Turns Ten: Blood Tests That Find Cancer Early
A decade after the first commercial ctDNA tests, blood-based screening is approaching the sensitivity to catch stage I cancer.
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Fragments in the bloodstream
Circulating tumour DNA lets a single draw flag multiple cancer types years before symptoms. Sensitivity at early stages has gone from ~30% to past 70% on multi-cancer panels.
The remaining gap is specificity — false positives still send healthy people into invasive workups.
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