CA 19-9 also known as Carbohydrate Antigen (CA 19-9) test is a kind of tumor marker that measures the number/amount of CA 19-9 in the blood. People with pancreatic cancer show a high amount of this antigen in the blood. However, there may be a significant increase due to other causes like infections in your liver, gallbladder, and pancreas or by other cancer. Doctors prescribe this test:-
Normal CA 19-9 test result indicates the value of 37 U/ml. The higher values may indicate cancer of the stomach, the pancreas, lung, liver, gallbladder or colon. If your CA 19-9 is more than 37U/ml but less than 75 U/mL, this would indicate an infection of your pancreas, gallbladder, liver disease, gallstones, or a disease called cystic fibrosis. The test report provides doctors the clue to decide about the future course of treatment or other follow-up action.