The CA-125 test measures the level of cancer antigen 125 in the blood, primarily used as a marker for ovarian cancer.

The measurement of serum CA-125 antigen is a standard procedure in the management of patients with advanced ovarian cancer. A study by Markman et al. showed that decreased concentration of serum ...

Since the FDA approval of CA-125 as a tumor marker test, when a pelvic mass could be an ovarian carcinoma, clinicians are turning to this test as a tool in the diagnostic investigation.