CEACAM5 and neoplasm: Elevated levels of the tumor markers, carbohydrate antigen 199 (CA199), carbohydrate antigen 72 − 4 (CA72-4) and carcinoembryonic antigen (CEA) were found in 6 of 20 (30.0%), 11 of 20 (55.0%) and 11 of 21 (52.4%) patients, respectively.