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Intel Lab Diagnostics Dubai
Single Biomarker

CA-19-9

Pancreatic & GI Marker

CA-19-9 is a tumour marker commonly associated with pancreatic cancer. It can also be elevated in other gastrointestinal cancers and some non-cancerous conditions. No fasting is required.

BLOOD24 HOURSNO FASTING
AEDAED230
  • Free home collection
  • Physician-reviewed report

24 Hours

Turnaround

Blood

Sample

About This Test

What the CA-19-9 test tells you

CA-19-9 is a carbohydrate structure carried on proteins and lipids made by the cells lining the pancreas, bile ducts, stomach and bowel. Small amounts reach the bloodstream normally. When those tissues are diseased, whether by a tumour or simply by inflammation and obstruction, much more is released, and that is what the blood test measures.

It is most closely associated with cancer of the pancreas, where it has three practical uses: helping assess a pancreatic mass that has already been found on imaging, giving an indication of prognosis before treatment, and following the disease during and after treatment. A falling value after surgery or chemotherapy supports response; a rising one prompts reassessment. It also has a role in cancers of the bile ducts and, less often, of the stomach and colon. It is not a screening test, and in people without symptoms it produces far more false alarms than useful findings.

Two things limit it heavily and both matter to anyone reading a result. The first is obstruction. Anything that blocks bile flow, whether a gallstone, an infected bile duct, or the tumour itself, raises CA-19-9 substantially without saying anything about how much cancer is present. Pancreatitis and jaundice from any cause do the same. A value taken while a person is jaundiced can badly mislead, and is usually repeated once the obstruction has been relieved. The second is genetic: producing this antigen requires an enzyme linked to the Lewis blood group system, and a well-recognised group of people simply do not have it. In them the test stays low no matter how advanced any disease might be, so it is uninformative for them entirely. For both reasons, a normal CA-19-9 never excludes pancreatic or biliary cancer, and the trend across repeated samples always means more than a single figure.

Sample type
Blood
Measured in
U/mL
Turnaround
24 Hours
Fasting
Not required
Best for
Adults & at-risk groups
Why Get Tested?

Used to monitor pancreatic cancer treatment response, assess prognosis, and aid in the differential diagnosis of pancreatic masses.

  • Monitoring known disease

    Serial values during and after treatment for pancreatic or biliary cancer show the direction the disease is moving, complementing imaging.

  • Detecting recurrence

    In follow-up after surgery, a sustained rise can suggest returning disease before it becomes visible on scans.

  • Assessing a known mass

    Alongside imaging and clinical findings, the value contributes to how a pancreatic or biliary mass that has already been found is managed.

  • Informing prognosis

    A value taken before treatment, once any blockage of bile flow has been relieved, carries prognostic information for the treating team.

When This Test Is Ordered

Reasons your doctor may request the CA-19-9 test

Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.

  • Assessing a mass or jaundice

    • A pancreatic or biliary mass already identified on imaging that needs further assessment.
    • Unexplained jaundice or persistent upper abdominal pain, investigated alongside imaging.

  • Treatment response & surveillance

    • Monitoring response to surgery or chemotherapy in diagnosed pancreatic or biliary cancer.
    • Surveillance for recurrence after treatment of pancreatic cancer.
    • Follow-up of cholangiocarcinoma or, in selected cases, gastric or colorectal cancer.
Preparation
The short version
No prep needed.
  • Blood
  • Free home collection
  • No fasting
  • Results in 24 Hours
  1. 1
    Book any time

    No fasting window: pick any slot that suits you, online or on WhatsApp.

  2. 2
    We come to you

    A DHA-licensed nurse collects your sample at home or in the office: free home collection.

  3. 3
    Results in 24 Hours

    A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.

Prep note
Physician reviewed

No fasting is required and you can take your usual medicines.

Tell the team if you are jaundiced, have known gallstones, or have recently had a stent or drain placed in the bile duct, because blocked bile flow raises CA-19-9 substantially by itself, and your doctor may prefer to sample after the blockage has been relieved so the value reflects the disease rather than the obstruction. Mention any recent episode of pancreatitis or infection of the bile ducts for the same reason.

If you are being monitored over time, use the same laboratory for each sample where possible and bring your previous results, since values from different assays are not directly comparable and the trend is what your doctor is reading.

Understanding Your Results

A result in the Normal band, 0 to 37 U/mL, is the usual finding and carries no independent meaning. A well-recognised group of people, defined by their Lewis blood group status, cannot produce this antigen at all, so their result stays low however advanced any disease might be. A result in the High band, 38 to 1000 U/mL, requires clinical correlation: blocked bile flow from gallstones, a stricture or infection raises CA-19-9 markedly with no cancer present, as do pancreatitis, cirrhosis and jaundice from any cause. A value measured while you are jaundiced reflects the obstruction as much as anything else, and is usually repeated once that has been relieved. Serial samples from the same laboratory carry the information rather than one figure. Your doctor interprets the trend alongside imaging, your symptoms and your history.

SmartReport
37
Healthy zone19U/mLNormal
Reference ranges · U/mL
Normal
Within the normal range.
0–37
High
Elevated: requires clinical correlation.
38–1000

Ranges are a guide: your physician interprets your result alongside your symptoms and history.

Reading a High or Low Result

  • What a higher result can point to

    • Obstruction of bile flow from gallstones, strictures or infection of the bile ducts, which commonly produces marked elevations with no cancer present at all.
    • Acute and chronic pancreatitis, cirrhosis, and jaundice from any cause.
    • Pancreatic cancer, the malignancy with which it is most strongly associated.
    • Cholangiocarcinoma and other cancers of the biliary tree.
    • Gastric, colorectal and some ovarian and lung cancers.
    • Benign conditions such as thyroid disease and bronchiectasis, less commonly.

These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests: your doctor decides what it means for you.

Limitations & Safety

What this test cannot tell you

  • Blocked bile flow raises CA-19-9 markedly on its own, so a value measured during jaundice reflects the obstruction as much as any tumour and is usually repeated after it has been relieved.
  • A well-recognised group of people, defined by their Lewis blood group status, lack the enzyme needed to produce the antigen at all; in them the result stays low however advanced any disease might be, so the test is uninformative.
  • It is not a screening test; in people without symptoms or a diagnosis it produces far more false alarms than useful findings.
  • A low result carries no independent meaning and does not exclude pancreatic or biliary cancer.

Risks of the blood draw

  • Mild bruising or brief soreness where the needle went in.
  • Occasional lightheadedness, which settles after a few minutes of rest.
  • Bleeding or infection at the site, which is rare with sterile single-use equipment.
Key Points
  • 1CA-19-9 is used to monitor known pancreatic and biliary cancer, not to screen for it in healthy people.
  • 2Gallstones, pancreatitis, blocked bile ducts and jaundice from any cause raise it strongly with no cancer present.
  • 3Some people cannot produce this antigen at all because of their blood group, so their result stays low regardless of disease.
  • 4A normal value does not exclude pancreatic or biliary cancer.
  • 5Serial values from the same laboratory are what carry the information, not any single figure.
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Frequently Asked Questions

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No. In people without symptoms it flags far more benign conditions than cancers, and it misses cancer entirely in those who cannot produce the antigen. Its accepted uses are helping assess a mass that has already been found and following disease that has already been diagnosed.