CA 19-9 antigen female 10 human 10 Article 9 middle aged 9 Humans 8 adult 8 male 8 pathology 8 Female 7 carcinoembryonic antigen 7 tumor marker 7 Male 6 Middle Aged 6 human tissue 6 Aged 5 Biomarkers, Tumor 5 aged 5 major clinical study 5 Colorectal Neoplasms 4 Prognosis 4 blood 4 cancer staging 4 colorectal tumor 4 controlled study 4 follow up 4 genetics 4 prognosis 4 Follow-Up Studies 3 area under the curve 3