Cancer Antigen CA 27.29 Blood Test

The Cancer Antigen (CA) 27.29 test is used to monitor people with Breast Cancer.  CA 27.29 in a protein which is used as a tumor marker to gauge how advanced a person's cancer is.  This test can also be used to determine how well a person is responding to treatment or therapy.  The CA 27.29 is not intended to be used as a screening.  This test is not considered specific enough to accurately determine if an undiagnosed person has breast cancer.  It is important to consult your doctor in determining the appropriate testing to aid in making a diagnosis.