CEACAM5 and neoplasm: The key laboratory values assessed during this phase include alkaline phosphatase (AP), glutamate oxaloacetate transaminase (GOT), glutamate–pyruvate transaminase (GPT), gamma-glutamyl transferase (GGT), albumin, total bilirubin, and tumor markers CA 19-9, CEA, and AFP (alpha-fetoprotein).