Oncology Central

Circulating cell-free DNA: a potential biomarker in lung cancer

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Cell-free DNA (cfDNA) is a promising, noninvasive tumor ‘liquid biopsy’ with quantitative and qualitative significance. Circulating cfDNA levels are raised in cancer patients and cfDNA exhibits genetic and epigenetic changes found in the underlying tumor. In lung cancer patients, cfDNA levels and tumor-associated genetic and epigenetic changes have been assessed as diagnostic, prognostic and predictive biomarkers. To date, many small studies have been reported with contradictory results. Their interpretation is hampered by differences in methodology and the selection of patients and controls.

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