CEACAM5 and cancer: In June 2023, slightly increased carcinoembryonic antigen (CEA) (from 59 to 62 μg/L; normal values < 3.0 ng/mL) and cancer antigen 15‐3 (CA15‐3) (from 24 to 31 IU/mL; normal values < 30 IU/mL) levels were observed without signs of progression on FDG PET/CT.