What is this test done for?
Cancer antigen 19.9 (CA 19.9) is used as a tumor marker to help differentiate between pancreatic cancer and other conditions, as well as to monitor pancreatic treatment response and/or recurrence.
Why is it Done?
Elevated levels of CA 19.9 can be seen in malignant conditions such as bile duct cancers, colorectal cancers, gastric cancers, esophageal cancers, pancreatic cancers, etc. Elevated levels can also be seen in benign conditions such as biliary tract obstruction, cholangitis, inflammatory bowel disease, thyroid disease, etc. CA 19.9 can only be used as a tumor marker if the cancer is producing elevated amounts of it. However, CA 19.9 test is not sensitive or specific enough to use as a screening test for cancer.
How is it done
A blood sample will be collected from a vein in your arm.
The CA 19.9 test may be used, along with other tests such as carcinoembryonic antigen (CEA), bilirubin, and/or a liver test, to help evaluate and monitor a person who has been diagnosed with pancreatic cancer and is undergoing treatment.