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What Is a Liquid Biopsy?
Chelsea Backler MSN, APRN, AGCNS-BC, AOCNS®
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Description
All cells (healthy cells and tumor cells) in the body shed DNA, called cell-free DNA (cfDNA). When it’s only from tumor cells, it’s referred to as circulating tumor DNA (ctDNA), although cfDNA and ctDNA are sometimes used interchangeably.