What Does The Ca-125 Measure ?


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A cancer antigen 125 (CA-125) is a protein found on the surface of many ovarian
cancer cells. It also can be found in other cancers and in small amounts in
normal tissue. A CA-125 test measures the amount of this protein in the blood.

CA-125 is used as a tumor
marker-which means the test can help show if some types of cancer are present.
Most often, the CA-125 test is used to check how well treatment for ovarian
cancer is working or to see if ovarian cancer has returned.

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