A member asked:

How reliable is the ca125 test for ovarian cancer?

4 doctors weighed in across 2 answers

Not very.: Ca 125 is touted as a screening tool for ov ca but is elevated in only 50% of those with early stage disease. Approx 1% of normals have a high ca 125. Since ovarian cancer is relatively uncommon, the ability of a positive test to predict ca is about 3%. There is general consensus that ca 125 is not a good screening tool for average risk females. Consider ca 125 for those with high risk.

Answered 1/26/2021

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CA 125: Ca 125 is not a reliable test to look for ovarian cancer. It is used in follow up of a woman with ovarian cancer or similar cancers.

Answered 8/16/2017

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