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Sources of epigenetic biomarkers of colorectal cancer. Blood and fecal DNA samples represent available non-invasive sources of epigenetic diagnostic biomarkers of colorectal cancer, such as the analysis of methylation of septin 9 (SEPT9) and vimentin (VIM) genes, respectively. In addition, the analysis of DNA samples from bioptic tumor tissues could be of relevance for the best choice of therapeutic intervention.
