The Cancer Antigen 125 (CA-125) is a tumor marker or biomarker that is best known as a marker for ovarian cancer, But CA-125 has limitedspecificity for ovarian cancer because elevated CA-125 levels can be found in individuals without ovarian cancer. Hence this assay, regardlessof level, should not be interpreted as absolute evidence for the presence or absence of malignant disease. The assay value should be used inconjunction with findings from clinical evaluation and other diagnostic procedures.