Circulating Microbial DNA as a Potential Cancer Biomarker: Technical Challenges and Controlled Evaluation
Abstract Background. Circulating microbial DNA (cmDNA) has been proposed as a non-invasive cancer biomarker, but most evidence comes from cancer-sequencing datasets not designed for microbial analysis and lacking contamination controls. Whether reported signatures reflect biology or artifact is unclear in low-biomass specimens, where standard taxonomic pipelines are prone to systematic error.…
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