CA 19-9 blood test helps to screen for pancreatic cancer. It can also be used as a marker in determining pancreatic tissue damages.
CA 19-9 has been shown to be elevated in some patients with cancer tumors. CA 19-9 has been reported as positive in 70% to 80% of pancreatic carcinomas, 50% to 60% of gastric cancers, 60% of hepatobiliary cancer, 30% of colorectal cancer, and few lung, breast or prostate cancers. Serum levels may differentiate pancreatic cancer from pancreatitis. The CA 19-9 blood test may also be positive in patients with non-neoplastic disease, particularly inflammatory disease of the bowel, cirrhosis, and autoimmune conditions including rheumatoid arthritis (33%), systemic lupus erythematosus (32%), and scleroderma (33%).
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