Abstract
Circulating cell-free DNA (cfDNA) is a kind of free DNA in circulating blood, including circulating tumor DNA (ctDNA) deriving from tumor cells and DNA deriving from normal tissue cells. CtDNA is a specific tumor DNA in cfDNA. CfDNA could reflect the status of tumor to a certain extent, which plays an important role in tumor diagnosis, disease monitoring, treatment evaluation, prognosis and recurrence judgement, and has a potential clinical value as a simple, effective and noninvasive liquid technology. As a new concept, the number of cfDNA analysis in B-cell tumors is increasing, such as the relationship between tumor-specific gene mutations, methylation changes, minimal residual disease (MRD) and prognosis, recurrence, monitoring of treatment effects, targeted therapy by using cfDNA sequencing technology. Key words: B-cell neoplasms; Circulating cell-free DNA; Liquid biopsy
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