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Also Known As: Cancer Antigen 125, CA-125 Tumor Marker, CA 125 Blood Test, CA125 Blood Test

Cancer antigen 125 (CA-125) is a protein that may be found at higher levels in people with certain types of cancer and other health conditions. The CA-125 test checks the levels of this protein in the blood.

The CA-125 test is a type of tumor marker test. This test is used in the process of monitoring a patient’s response to ovarian cancer treatment, and detecting recurrence of ovarian cancer after treatment.

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