CEACAM5 and neoplasm: There were no significant differences regarding sex distribution, age, tumor location, tumor size, clinical presentation, and elevation of serum markers including lipase, amylase, CEA, and AFP between resectable and unresectable groups, except for more patients presenting with body weight loss (18.2% vs. 77.8%, p = 0.008) and elevated serum CA 19‐9 (27.3% vs. 75.0%, p = 0.040) in the unresectable group.