Women’s marker panel

The women’s marker panel measures four tumour markers from one blood draw: CEA, CA 19-9, CA 125 and CA 15-3. They are most commonly used for follow-up after cancer treatment or in investigations led by a doctor. It is important to know the limitations too: tumour markers are not a test through which a healthy person can detect or rule out cancer.

Who the panel is for

• you have been treated for breast, ovarian, colorectal or pancreatic cancer, and your oncologist has prescribed marker monitoring;
• you are starting treatment for a diagnosed tumour and a doctor wants baseline values;
• you are undergoing doctor-led investigations, and ultrasound or symptoms already suggest a particular disease, such as an ovarian mass;
• you monitor markers over time and want them measured at the same laboratory so results are comparable.

In people without symptoms or a diagnosis, markers are not a reliable way to detect cancer, and a mildly elevated value often has a harmless cause. Early detection of breast, cervical and colorectal cancer uses mammography, cervical smear testing and stool testing for occult blood, within national programmes if you belong to a group they cover.

What the panel detects

• CEA: most often used to monitor colorectal cancer; it may also be elevated in breast and lung cancer, but also in women who smoke and in inflammation (more about CEA).
• CA 19-9: monitors pancreatic and bile duct cancer, and also rises in bile obstruction or pancreatic inflammation (more about CA 19-9).
• CA 125: monitors ovarian cancer and, alongside ultrasound, helps assess an ovarian mass. It also rises in endometriosis, fibroids, pelvic inflammation, menstruation and pregnancy (more about CA 125).
• CA 15-3: used to monitor diagnosed breast cancer, particularly advanced disease. It is not a breast cancer detection test (more about CA 15-3).

No marker alone shows whether a tumour exists or where it is. Change over time is more important than one number. With an already detected ovarian mass, a doctor may also request the HE4 and ROMA index.

The procedure and preparation

Blood is taken from a vein, and the draw takes only a few minutes. Fasting is not required. If you are menstruating, have blood drawn after it ends, because CA 125 may be elevated during menstruation.

Mention if you are pregnant or have recently had surgery or inflammation in the abdomen. If you take biotin (for example, hair and nail supplements), mention it at the blood draw. If you monitor markers, bring previous results.

What your result means

• All values within range: a good sign during monitoring, but normal results do not exclude cancer. See a doctor if symptoms persist.
• Mildly raised marker: most often is not a sign of cancer. Endometriosis, fibroids or menstruation often raise CA 125, and smoking and inflammation raise CEA, so a doctor usually repeats the test.
• Rise over several measurements: in women treated for cancer, this is a reason for additional tests determined by the oncologist.
• Elevated CA 125 with an ovarian mass: a gynaecologist assesses the result alongside ultrasound and age and, if needed, HE4 and the ROMA index.

Reference values depend on the method and are printed on the report. A marker is always interpreted alongside other results and the disease course. We provide an overview of all markers in the article Tumour markers.

How to arrange testing

You can have blood taken without an appointment or referral at one of our branches across Croatia (listed under Contact). Prices for all tests and panels are available in the price list.

Frequently asked questions

Can tumour markers check whether I have cancer?

Not reliably. Normal results do not exclude cancer and raised results do not establish it. Cancer is detected through examination, imaging and tissue analysis; markers help a doctor with known disease or doctor-led investigation.

Why avoid measuring CA 125 during menstruation?

CA 125 naturally rises during menstruation, so a mildly elevated result could cause unnecessary concern. It is therefore better to have blood drawn after menstruation ends, unless your doctor says otherwise.

Does CA 15-3 detect breast cancer?

No. CA 15-3 is most often normal in early breast cancer, so it is used only to monitor already diagnosed disease. Breast examination and mammography are used for early detection.

When should I see a doctor regardless of results?

If you notice a breast lump, bleeding after menopause, persistent abdominal bloating, blood in stools or unexplained weight loss. A new symptom is a reason for examination, regardless of the marker result.