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Dictionary of Cancer Terms

View in Spanish: Ensayo de CA 19-9

CA 19-9 assay ( A-say)
A test that measures the level of CA 19-9 in the blood. CA 19-9 is a tumor marker released into the bloodstream from both cancer cells and normal cells. Higher than normal amounts of CA 19-9 in the blood can be a sign of gallbladder or pancreatic cancer or other conditions.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.