CEACAM5 and neoplasm: The pretreatment positivity rates of tumor markers are different in previous studies., CEA positivity is normally reported at between 15.8 and 57.6%, CA19-9 at between 23.1 and 50%, and CA72-4 at between 18.6 and 58% [14, 18–22], and results of our study on the percentage of marker positivity are within these ranges (CEA: 37.7%; CA19-9: 23.1%; CA72-4: 42.1%; and CA125: 23.2%).