About this test

What is this test for?

CA 19-9 is primarily used to monitor trends over time rather than to establish a diagnosis on its own. Serial measurements can support clinical decision-making when interpreted alongside imaging and other investigations.


What does this test measure?

The test measures carbohydrate antigen 19-9 (CA 19-9), a tumour-associated marker that can be elevated in some gastrointestinal cancers. Levels may also rise in certain benign conditions such as inflammation or bile duct obstruction.


When is this test recommended?

CA 19-9 testing may be requested when monitoring certain gastrointestinal conditions, particularly in individuals undergoing follow-up for pancreatic or biliary tract disorders. It is not typically used as a routine screening tool but may be ordered when tracking treatment response or disease progression.


What’s included in this test

Tumour markers
GI monitor (CA 199)
GI Monitor (CA 19-9) is commonly used to monitor gastrointestinal cancers, particularly pancreatic and bowel cancers. Also used to track treatment progress.

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