Other Names for the CA-125 Test

The CA-125 test may also be known as:

Cancer Antigen 125 test
Ovarian Cancer Marker Test
CA-125 Tumor Marker Test

Purpose of the CA-125 Serum Test

The CA-125 Serum Test measures the level of the CA-125 protein (cancer antigen 125) in the blood. CA-125 is a protein found in higher levels on the surface of ovarian cancer cells and in some other cancers and health conditions. This test is commonly used to:

Monitor ovarian cancer in individuals diagnosed with the disease, especially to track treatment progress or detect recurrences.
Screen for ovarian cancer in high-risk individuals with a family history or genetic predisposition.
Diagnose other conditions such as endometriosis, pelvic inflammatory disease, and some types of benign tumors, which can also cause elevated CA-125 levels.

Note: While elevated CA-125 levels can suggest the presence of ovarian cancer, they do not provide a definitive diagnosis. Levels can also rise due to non-cancerous conditions, so further diagnostic tests are typically required.

Normal CA-125 Levels

Normal CA-125 levels are generally considered to be under 35 units per milliliter (U/mL). Elevated levels may indicate cancer or other health conditions, but normal levels do not always rule out ovarian cancer, especially in its early stages.

Preparation for the CA-125 Serum Test

Fasting: No fasting is required for this test. You can eat and drink normally.
Medication Disclosure: Inform your doctor of any medications or supplements you are taking, as some may influence test results.
Menstrual Cycle: For premenopausal women, it may be best to schedule the test outside of the menstrual period, as CA-125 levels can sometimes rise temporarily during menstruation.

Frequently Asked Questions (FAQs)

1. Why would a doctor order a CA-125 test?
Doctors may order this test to monitor ovarian cancer treatment, assess for recurrence, or screen for ovarian cancer in high-risk individuals. It can also help in diagnosing other health conditions that may cause elevated CA-125 levels.

2. Can elevated CA-125 levels mean something other than cancer?
Yes, CA-125 levels can be elevated in benign conditions like endometriosis, pelvic inflammatory disease, fibroids, and menstruation, as well as in some other cancers.

3. How is the test performed?
A small blood sample is taken from a vein in your arm, usually a quick and minimally painful procedure.

4. Are there any risks associated with the CA-125 test?
The CA-125 test is a standard blood test, and risks are minimal. You may experience slight pain, bruising, or discomfort at the puncture site, but complications are rare.

5. How long does it take to get results?
Results are typically available within a few days, depending on the lab.

6. What happens if my CA-125 levels are elevated?
If CA-125 levels are elevated, your doctor may recommend additional tests, such as imaging (ultrasound, CT scan) or other blood tests, to investigate the cause. Elevated CA-125 alone does not confirm cancer.

7. Is the CA-125 test reliable for ovarian cancer screening?
While the CA-125 test is useful for monitoring ovarian cancer in diagnosed cases, it is not entirely reliable as a standalone screening test for ovarian cancer. False positives can occur due to non-cancerous conditions, and early-stage ovarian cancer does not always result in elevated CA-125 levels.

Conclusion