The sensitivities of the 9 piRNAs in colorectal cancer patients had values from 54.60 to 93.10%; however, current clinical diagnostic biomarkers (CEA and CA19-9) for colorectal cancer had respective values from 41.11 to 41.80 and from 19.10 to 27.78 (Fig 2B). This evidence concerns the gene CEACAM5 and colorectal cancer.