In laboratory examination, tumour markers were in the normal range, serum carcinoembryonic antigen (CEA) was 4.4 ng/mL, pro‐gastrin‐releasing peptide (Pro‐GRP) was 49.7 pg/mL, and cytokeratin 19 fragment (CYFRA) level was < 1.0. This evidence concerns the gene CEACAM5 and neoplasm.