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- W4224883699 abstract "Analysis of circulating tumor DNA (ctDNA), also known as liquid biopsy, has been postulated to be a useful test in the prognostication, molecular profiling, and monitoring of cancer patients. In this series we aimed to analyze the concordance between the mutation status of formalin-fixed paraffin-embedded (FFPE) tumor samples and matched ctDNA, considering tumor molecular profiling as the gold standard technique.This retrospective study included cancer patients with complete diagnostics and gene mutations detected in a previous FFPE tumor tissue Next-Generation Sequencing (NGS) study with a matched frozen plasma sample available for an NGS ctDNA assay.Sixty patients were included, 24 with colorectal carcinoma (CRC) and 36 with non-small cell lung cancer (NSCLC). In 27.1% of ctDNA studies a new mutation not previously detected in the matched tumor was found. 11.9% of these ctDNA results had the potential to impact clinical management. Globally, the concordance rate between FFPE tumor samples and ctDNA was 44.4%. When tumors were stratified by stage, the concordance was 76.5%, 70%, 36.4%, and 0% in tumor stages IV, III, II, and I, respectively. ctDNA molecular profiles showed a good concordance rate in advanced stage tumors and identified undetected mutations in tumor tissues. In early tumor stages the concordance was low, casting doubt on the usefulness of ctDNA in these patients." @default.
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- W4224883699 date "2022-07-01" @default.
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- W4224883699 title "Concordance analysis between liquid biopsy (ctDNA) and tumor DNA molecular profiles from panel-based next-generation sequencing" @default.
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- W4224883699 doi "https://doi.org/10.1016/j.patol.2022.01.001" @default.
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