(5) Tumor marker indicators: Alpha-fetoprotein (AFP) 2.7 ng/mL (reference range: 0–7 ng/mL), carcinoembryonic antigen (CEA) 4.4 ng/mL (reference range: 0–5 ng/mL), cancer antigen CA153 (CA153) 25 IU/mL (reference range: 0–15 IU/mL), PSA: 0.001 ng/mL, free PSA: 0.001 ng/mL. Here, CEACAM5 is linked to cancer.