Markers of cancer, including CEA (Carcinoembryonic Antigen), AFP (Alpha-fetoprotein), CA125 (Cancer Antigen 125), CA15.3 (Cancer Antigen 15.3), NSE (Neuron-Specific Enolase); markers of thyroid function (TSH, Thyroid-Stimulating Hormone; FT3, Free Triiodothyronine; FT4, Free Free thyroxine); antibodies against celiac disease; vitamin B12 and level of folic acid showed all normal values. Here, CEACAM5 is linked to cancer.