CEACAM5 and neoplasm: The tumour marker levels were as follows: carcinoembryonic antigen (CEA), 1.6 ng/mL (normal range, <5.0 ng/mL); carbohydrate antigen 15-3 (CA15-3), 8.0 U/mL (normal range, <31 U/mL); and soluble interleukin-2 receptor (sIL-2R), 1390 U/mL (normal range, 220–530 U/mL).