If you had to name one or 2 monitoring blood tests for pancreatic cancer would you include carbohydrate antigen 19-9 even with its false positives?

Homework: Name whatever you think your instructor wants. All tumor markers have false negatives and false positives. CA19-9 is the most useful marker in pancreatic cancer. You're not going to use it for screening. It's helpful if the original tumor produces it -- rising levels let you know it's back.

Monitoring not Dx: There are number of chemicals associated with pancreatic cancer. None of these is good for making a diagnosis, but may be used to monitor the progress of disease. However even for that the role is limited due to other issues affecting levels of these markers, including CA 19-9. See this site for more info on this topic. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3079322/