Similar results were found for CEACAM 5: serum values were higher in the PDAC group compared to BD, but not for CP (PDAC median 8.5 μg/l, range 0.7–75.2 ng/ml; CP median 4.8 μg/l, range 0.7–24.0; BD median 1,9 μg/l, range 0.2–9.2 μg/l; P = 0.122 and P = 0.002, respectively). Here, CP is linked to Behcet disease.