What Is a CA-125 Blood Test? Cancer antigen 125 (CA-125) is a protein found in ovarian cancer cells. A CA-125 blood test measures the amount of cancer antigen 125 in the bloodstream. The protein is ...
The cancer antigen 125 (CA-125) test is a blood test. It measures a protein in the bloodstream that can indicate various health conditions. These include certain types of cancer, such as ovarian ...
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