CEACAM5 and neoplasm: A blood test revealed that the blood count, biochemical examination, and tumor markers including carcinoembryonic antigen (CEA) and DUPAN-2, were within the normal range, while carbohydrate antigen 19-9 (CA19-9), SPan-1, and carbohydrate antigen 125 were elevated (208 U/ml, 54.8 U/ml, and 45.9 U/ml, respectively).