CA 19-9 Test
CA 19-9 Test FAQ
What is the CA 19-9 test?
Why is the CA 19-9 test important?
What type of specimen will I submit?
Do I need to fast to take this test?
How long does it take to get test results?
Accesa Labs does not provide medical advice, diagnosis or treatment. All users should consult with a medical provider for specific health concerns.
CA 19-9 Lab Test - More Information
The CA 19-9 test measures the carbohydrate antigen 19-9 blood level.
CA 19-9 is a blood marker that is sometimes tracked in people with cancer of the pancreas. Also called cancer antigen 19-9 and sialyated Lewis (a) antigen, CA 19-9 is named from how it binds to a specific tumor marker.
Many cancer organizations recommend using CA 19-9 as more of a tracking (rather than screening) marker for pancreatic cancer. Used in this way, CA 19-9 blood levels should decrease as a pancreatic tumor decreases in size as CA 19-9 is typically released by the pancreas. CA 19-9 levels can be elevated in other types of gastrointestinal cancers as well as bile duct disease. A small percentage of people do not produce CA 19-9. CA 19-9 lab results are typically reported in U/mL units.
CA 19-9 blood levels cannot be used in isolation as absolute evidence of the presence or absence of a disease and all results should be evaluated in conjunction with a licensed medical provider.
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