These were homogenously distributed between the investigated study groups except for gender (p = 0.034), pre-surgical chronic pancreatitis (p < 0.001), and pre-surgical levels of circulating CA.19-9 (p < 0.001), CEA (carcinoembryonic antigen, p < 0.013), and bilirubin (p = 0.001). Here, CEACAM5 is linked to chronic pancreatitis.