A CA-125 test is a blood test that measures the amount of the protein CA-125, also called cancer antigen 125, in your body.

CA-125 is a type of biomarker or a substance in your blood that may be a sign of a condition or disease.

A high level of CA-125 can be a sign of ovarian cancer.


Why it's done


Your health care provider may recommend a CA 125 test for several reasons:

To monitor cancer treatment

To screen for ovarian cancer if you're at high risk.

To check for cancer recurrence


What do the results mean?

being treated for ovarian cancer,....

you may be tested several times throughout your treatment.

If testing shows your CA-125 levels have gone down, it usually means the cancer is responding to treatment.

If your levels go up or stay the same, it may mean the cancer is not responding to treatment.



have finished your treatment for ovarian cancer, ......high CA-125 levels may mean your cancer has come back.



not being treated for ovarian cancer

results show high CA-125 levels, it can be a sign of cancer.

But it may also be a sign of a noncancerous condition, such as:

Endometriosis
Pelvic inflammatory disease
Uterine fibroids
Liver disease
Pregnancy

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