CPT® Code 86304

A quantitative immunoassay for tumor antigen CA 125 is a laboratory test that measures the level of the CA 125 protein in the blood. CA 125 is a type of tumor marker, which is a substance produced by cancer cells or by normal cells in response to cancer in the body. The presence of elevated levels of CA 125 in the serum can indicate the presence of a malignant neoplasm, particularly in the context of ovarian cancer. This test is particularly significant for patients who have a documented ovarian mass, as it aids in differentiating between benign and malignant conditions. Additionally, the CA 125 test is utilized to monitor the effectiveness of treatment in patients who have already been diagnosed with ovarian, fallopian tube, or endometrial cancer. The test employs an electrochemiluminescent immunoassay test kit, which is a sophisticated method that enhances the sensitivity and specificity of the measurement. Regular monitoring of tumor antigen levels is essential, as it provides valuable information regarding the progression or regression of the malignancy when used alongside other clinical assessments.