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Also reported in: kU/L
Your CA 19-9 is in the normal range. This result does not suggest pancreatic, biliary, or colorectal pathology at this time.
Your CA 19-9 is undetectable. Notably, approximately 5–10% of the population lacks the Lewis antigen and cannot produce CA 19-9, giving permanently undetectable values. An undetectable result is otherwise an excellent finding.
No action needed. If you are undergoing cancer surveillance and have previously had measurable CA 19-9, discuss with your oncologist.
CA 19-9 undetectable — no detectable CA 19-9 expressionYour CA 19-9 is within the normal reference range. This is reassuring, though CA 19-9 is not a reliable screening test for pancreatic cancer in the general population due to low sensitivity in early disease.
No action needed. Standard GI health monitoring applies.
CA 19-9 within normal reference range — no elevated pancreatic or GI markerYour CA 19-9 is in the low-normal range. This is a favorable baseline finding for pancreatic and gastrointestinal health.
No action needed.
CA 19-9: low-normal — favorable baselineYour CA 19-9 is in the normal range. This result does not suggest pancreatic, biliary, or colorectal pathology at this time.
No specific action required.
CA 19-9 within reference range — acceptable GI marker levelYour CA 19-9 is in the optimal low range, which is a very reassuring result for pancreatic and gastrointestinal health.
No action needed.
CA 19-9: optimal — very low marker levelYour CA 19-9 is above the reference range. Mildly elevated CA 19-9 is often caused by benign conditions including bile duct obstruction, pancreatitis, cholangitis, liver cirrhosis, and inflammatory bowel disease. However, it can also indicate early pancreatic, biliary, or colorectal cancer.
Consult your doctor. Abdominal imaging (CT or MRI/MRCP) and liver function tests are typically indicated. The result should be interpreted alongside symptoms and clinical findings.
CA 19-9 37–200 U/mL — borderline elevated; benign causes common; investigation warrantedYour CA 19-9 is significantly elevated. At this level, the probability of pancreatic cancer, cholangiocarcinoma, or other serious hepatobiliary malignancy increases substantially. noticeable benign biliary obstruction can also cause marked CA 19-9 elevation.
Seek prompt specialist gastroenterology or surgical oncology referral. CT abdomen/pelvis, MRCP, and/or endoscopic evaluation should be arranged without significant delay.
CA 19-9 200–500 U/mL — significantly elevated; high suspicion for pancreatic or biliary pathologyYour CA 19-9 is critically elevated. At this level, the likelihood of advanced pancreatic cancer, cholangiocarcinoma, or metastatic gastrointestinal malignancy is high. This requires urgent medical evaluation.
Seek urgent specialist oncology or gastroenterology evaluation immediately. Comprehensive imaging and biopsy planning should be initiated as soon as possible.
CA 19-9 >500 U/mL — critically elevated; urgent malignancy evaluation requiredUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.