CEACAM5 and neoplasm: The patient's blood values were normal except that the angiotensin-converting enzyme (ACE) level was 103 U/L (normal range 12-82 U/L). Tumor markers, including carcinoembryonic antigen (CEA), cancer antigen 125 (CA-125), and cancer antigen 19-9 (CA 19-9), were within normal limits.