CEACAM5 and neoplasm: Tumour marker levels were as followed: carcinoembryonic antigen (CEA) 2.5 ng/ml (<5 ng/ml), cancer antigen 19-9 (CA19-9) 0 U/ml (0–36 U/ml), DUPAN-II 215 U/ml (<150 U/ml), and elastase 281 ng/dl (28–254 ng/dl).