Abstract:Background: The aim of this study was to assess whether both ubiquitous and heterogeneous somatic mutations could be detected in circulating cell-free DNA (cfDNA) from patients with esophageal squamous cell carcinoma (ESCC). Methods: Paired multi-regional tumor tissues, cfDNA and white blood cells (WBCs) collected from five ESCC patients before treatment from a prospective study (NCT02395705). Of them, samples from Cohort 1 (E102 and E110) were sequenced by whole-exome sequencing (WES) and those from Cohort 2 … Show more
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