Test name
- ქართულად
- სიმსივნური მარკერი CA 19-9
- English
- Cancer Antigen 19-9
- Abbreviation
- CA 19-9
What does the test measure?
Measures a marker that may be used to monitor certain gastrointestinal tumors.
Why is it ordered?
To monitor certain cancers of the gastrointestinal tract and pancreas.
How should I prepare?
- If possible, bring previous results for the same marker so your doctor can assess how they have changed.
- A special diet is usually not needed; check any specific requirements for the test with the laboratory.
- Tell your treating doctor about your current treatment and medications.
- Agree on when to repeat the test with your doctor; results from different methods are not always directly comparable.
Do I need to fast?
Fasting is generally not required. If another test has been ordered at the same time, the overall preparation plan may change.
When should the test be done?
A specific time is generally not required. If your doctor has set a different time, follow those instructions.
What can affect the result?
- Coexisting benign conditions
- Age, kidney function or hormonal status, depending on the marker
- Differences between methods used by different laboratories
Which sample is needed?
Venous blood — serum or plasma, depending on the method
How is the sample collected and stored?
The blood sample is collected by a qualified staff member. The tube type, required volume, and processing and storage conditions are set by the laboratory's specific method. You do not need to store the sample yourself.
What does the result mean?
A rise in CA 19-9 is not specific to cancer; it can also occur with benign bile duct problems.
When should I see a doctor?
If the marker is raised, see your treating doctor; do not try to diagnose or rule out cancer on your own based on the result.
Important warnings and recommendations
A tumor marker on its own cannot confirm or rule out cancer. Your doctor should decide whether to use it and how often to repeat it.