CEACAM5 and neoplasm: Glomerular filtration rate (GFR) was 38.20 ml/min/1.73 m2 (normal, 56–122 ml/min/1.73 m2), serum creatinine was 202 mol/l (normal, 68–108 mol/l), carcinoembryonic antigen (CEA) was 116 ng/ml (normal, 5 ng/ml), and circulating tumor cell folate acid receptor (FR‐CTC) was 12.8FU/3 ml (normal, 8.7FU/3 ml), and the remaining laboratory tests, including urine tests, were normal.