The examined clinical characteristics of the patients included the following: age, pathological stage, tumor size, lymph node metastasis, distant metastasis, ascites formation, chemotherapeutic response, chemotherapeutic resistance, and the levels of cancer antigen 125 (CA125), cancer antigen 19–9 (CA19–9), cancer antigen 72–4 (CA72–4), alpha-fetoprotein (AFP), and carcinoembryonic antigen (CEA). The gene discussed is CEACAM5; the disease is neoplasm.