Tumour markers (AFP: 2.4 μg/L, carcinoembryonic antigen: 3.6 μg/L and carbohydrate antigen 19 to 9: 2.9 U/mL), complete blood count (red blood cells: 4.74 × 1012/L, white blood cells: 6.23 × 109/L, platelets: 181 × 109/L) and liver function tests (alanine aminotransferase: 11 U/L, aspartate transaminase: 25 U/L, albumin: 39.4 g/L) were all within normal limits. This evidence concerns the gene CEACAM5 and neoplasm.