In all enrolled PDAC patients with any primary cancer location, tumor location, gender, age, BMI, histological grade, symptoms, fasting blood glucose, tumor size, perineuronal invasion, T category, N category, hepatic metastasis, LNR, lymph node metastasis (LNM), and preoperative levels of CA19-9, CA125, and CEA were identified to be significantly associated with survival (Table 2). The gene discussed is CEACAM5; the disease is cancer.