CEACAM5 and familial pancreatic carcinoma: The most common symptoms in patients with pancreatic cancer are abdominal pain, anorexia, fatigue, and weight loss [3]; pancreatic cancer lacks specific biomarkers [4], and the main serum markers commonly used today are carcinoembryonic antigen and carbohydrate antigen 19-9; however, their sensitivity is not ideal [3].