Tumor Markers: what is included

In shortTumor markers are proteins whose level can rise with cancer — but also with benign conditions. Their working jobs: PSA for prostate monitoring after a shared decision with a urologist (typical landmark up to 4.0 ng/mL (4.0 µg/L)), CA-125 for evaluating an already-found ovarian mass (landmark up to 35 U/mL), and AFP for surveillance in cirrhosis and hepatitis alongside ultrasound (0.7–9.3 ng/mL (0.7–9.3 µg/L)). For screening healthy people without symptoms, they do not fit.

What this panel covers

A tumor marker is a protein that a tumor may overproduce. The key word is "may": the same proteins rise with inflammation, benign disease, and physiological states, while some tumors produce no markers at all. That is why no marker makes or excludes a diagnosis on its own.

Each marker has its legitimate niche. PSA assesses the prostate together with a urologist's examination and MRI. CA-125 helps evaluate already-detected ovarian masses with ultrasound and tracks treatment. AFP is followed over time in chronic liver disease and in germ cell tumors — together with hCG.

Markers on the panel

PSA CA-125 AFP CA 15-3 CA 19-9 HE4 (epididymis protein 4)Carcinoembryonic antigen

Why it is ordered

A doctor orders a marker with context: an imaging finding, symptoms, heredity, or a confirmed diagnosis that needs monitoring. Testing a panel "just in case" is unwise: in a healthy person a randomly raised number more often means a benign cause yet triggers weeks of anxiety and investigations, while a normal result falsely reassures.

How to prepare

Morning, fasting. PSA — no cycling, ejaculation, or prostate massage for 24–48 hours. CA-125 is best taken outside menstruation. Tell the doctor about inflammation and chronic liver disease — they change AFP and CA-125 unrelated to cancer.

How to read the report

A single value says little — the degree of elevation and the trend matter. A year-on-year PSA rise worries more than one moderate value after cycling or ejaculation. Up to 35 U/mL is the typical CA-125 landmark, but endometriosis and menstruation raise it without any tumor. Below, each marker is covered individually: preparation, landmarks, and causes of deviation.

Several markers on your report?

See how MedProtect explains results in the app: the whole report, a check of the recognized values, and a clear breakdown.

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Frequently asked questions

A marker is high — is it cancer?

No: most markers have low specificity, and benign causes are more common. The calm algorithm: retest in the same laboratory with proper preparation, then review the result with the right specialist — a urologist for PSA, a gynecologist for CA-125.

Do normal markers guarantee there is no tumor?

No, and that is the main trap: some tumors produce no markers. A reassuring report does not replace proven screening — mammography, colonoscopy, examinations.

Which markers are taken for prevention?

None are recommended for preventive screening in people without symptoms. PSA comes closest — and even it is taken by shared decision with a urologist after 45–50, earlier with family history.

Sources

Prostate-Specific Antigen (PSA) Test: MedlinePlus Medical Encyclopedia — MedlinePlus, National Library of Medicine. Accessed: August 31, 2026.
CA-125 Blood Test: MedlinePlus Medical Encyclopedia — MedlinePlus, National Library of Medicine. Accessed: August 31, 2026.
Alpha-Fetoprotein (AFP) Test: MedlinePlus Medical Encyclopedia — MedlinePlus, National Library of Medicine. Accessed: August 31, 2026.