CEACAM5 and cancer: Tumor marker assessment showed low levels of CA-125 at <4 U/mL (normal range: <25 U/mL), cancer antigen 19-9 (CA19-9) of 4.48 U/mL (normal range: <37 U/mL), carcinoembryonic antigen (CEA) of 0.76 ng/mL (normal range: <5 ng/mL), and alpha-fetoprotein (AFP) of 2.91 ng/mL (normal range: <10 ng/mL).