CA 19-9

MeasuredFiller

A protein sometimes raised in pancreatic and bile duct cancer.

A monitoring tool that, used as a screening test, is close to useless and often alarming.

How we rate it: Filler

Rarely changes anything for someone with no symptoms.

This rating and the description above were written against published screening guidelines by someone who is not a clinician, and are awaiting review by one. We would rather say that than imply an authority we do not have.

Check-ups that include it

In 2 of the 93 check-ups we track, 2%. Cheapest first.

Also sold as

Every one of these names refers to this same test. Resolving them to one canonical entry is what makes an honest comparison possible.

  • ca 19 9
  • ca199
  • cancer antigen 19 9

Information here is for comparing packages, not for diagnosing yourself. Talk to a doctor about which tests you actually need.