What are circulating tumor DNA (ctDNA) and circulating tumor cells (CTCs)?
什么是循环肿瘤DNA（ctDNA）和循环肿瘤细胞（CTC）？
Circulating tumor DNA (ctDNA) consists of small fragments of DNA shed by tumor cells into the bloodstream. Circulating tumor cells (CTCs) are whole cancer cells that have detached from the primary tumor and are circulating in the blood. Both are key biomarkers used in liquid biopsies.
循环肿瘤 DNA (ctDNA) 由肿瘤细胞脱落到血液中的 DNA 小片段组成。循环肿瘤细胞 (CTC) 是从原发肿瘤分离并在血液中循环的完整癌细胞。两者都是液体活检中使用的关键生物标记。