Both SEPT9 and SHOX2 showed a strong correlation with levels of the established tumour biomarkers CEA and CA 19–9 (SEPT9/CEA: Spearman’s ρ = 0.270, P = 0.001; SEPT9/CA 19–9: ρ = 0.161, P = 0.049; SHOX2/CEA: ρ = 0.313, P < 0.001; SHOX2/CA 19–9: ρ = 0.215, P = 0.008). Here, CEACAM5 is linked to neoplasm.