Characteristic features of the entity include abdominal pain, biliary strictures, and jaundice.3 Although unspecific, serological studies, such as serum bilirubin, liver enzymes (alkaline phosphatase [ALP], γ-glutamyl transpeptidase, and the transaminases), tumor markers (carbohydrate antigen 19-9 [CA19-9] and carcinoembryonic antigen [CEA]), are useful as a diagnostic guide. Here, CEACAM5 is linked to neoplasm.