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#PeCan-seq# 液體活檢是通過監(jiān)測腫瘤或轉(zhuǎn)移灶釋放到血液、尿液或其他體液中的循環(huán)腫瘤細胞(CTC)、循環(huán)腫瘤DNA(ctDNA)及外泌體,提供腫瘤相關(guān)信息,進而幫助制定適當?shù)闹委煼椒?。相對其他標志物,ctDNA有著樣本量足、時空穩(wěn)定性好等獨特優(yōu)勢,已在成人惡性腫瘤中得到了廣泛的研究。與成年人相比,兒童癌癥突變負荷通常較低,并且是由異質(zhì)性突變驅(qū)動的。目前,ctDNA在兒童癌癥,特別是白血病的疾病檢測和監(jiān)測中的實用性尚未得到證實。